Lenovo C240/245/255 All-In-One PC

Hardware Maintenance Manual

ideaideaideaCentreidea
Machine Types: 10113/6268 [C240];10114/6269 [C245];10137/F0A1
[C255]

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 Lenovo C240/245/255 All-In-One PC
Hardware Maintenance Manual

Machine Types: 10113/6268 [C240];10114/6269 [C245];10137/F0A1

[C255]

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 Fourth Edition (July 2013)25th
© Copyright Lenovo 2012, 2013.

LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software are delivered pursuant a General Services
Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No.
GS-35F-05925

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 Contents

Chapter 1. About this manual . . . . . . 1 Chapter 7. Locating connectors,

Important Safety Information . . . . . . . . . . 1 controls and components . . . . . . 21
Chapter 2. Safety information . . . . . . 3 Chapter 8. Replacing hardware . . . . 27
General safety . . . . . . . . . . . . . . . . 3 General information . . . . . . . . . . . . . 27
Electrical safety . . . . . . . . . . . . . . . 3 Replacing the keyboard and mouse . . . . . . 28
Safety inspection guide . . . . . . . . . . . . 5 Replacing the optical drive . . . . . . . . . . 28
Handling electrostatic discharge-sensitive Replacing the power adapter . . . . . . . . . 30
devices . . . . . . . . . . . . . . . . . . 5 Removing the rear cover . . . . . . . . . . . 31
Grounding requirements . . . . . . . . . . . . 6 Replacing a memory module . . . . . . . . . 32
Safety notices . . . . . . . . . . . . . . . . 6 Replacing the hard disk drive . . . . . . . . . 32
Replacing the heat-sink . . . . . . . . . . . 33
Chapter 3. General information . . . . . 9
Replacing the system fan . . . . . . . . . . 34
Specifications . . . . . . . . . . . . . . . . 9
Replacing the Wi-Fi card. . . . . . . . . . . 35
Chapter 4. General Checkout . . . . . 11 Replacing the speaker system . . . . . . . . 36
Replacing the front indicator board. . . . . . . 37
Chapter 5. Using the Setup Utility. . . 13 Replacing the power switch board . . . . . . . 38
Starting the Lenovo BIOS Setup Utility program . 13 Replacing the motherboard. . . . . . . . . . 39
Viewing and changing settings . . . . . . . . 13 Replacing the computer stand . . . . . . . . 41
Using passwords. . . . . . . . . . . . . . 13 Replacing the camera . . . . . . . . . . . . 41
Enabling or disabling a device . . . . . . . . 15 Replacing the converter board . . . . . . . . 42
Selecting a startup device . . . . . . . . . . 16 Replacing the LED panel. . . . . . . . . . . 43
Changing booting mode . . . . . . . . . . . 17
Exiting the Lenovo BIOS Setup Utility program . . 17 Chapter 9. FRU lists-C240–245 . . . . 47

Chapter 6. Symptom-to-FRU Index . . 19 Chapter 10. FRU lists-C255 . . . . . . 51

Hard disk drive boot error . . . . . . . . . . 19
Chapter 11. Additional Service
Power Supply Problems . . . . . . . . . . . 19
Information . . . . . . . . . . . . . . 57
POST error codes . . . . . . . . . . . . . 20
Undetermined problems . . . . . . . . . . . 20

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 iv Lenovo C240/245/255 All-In-One PC Hardware Maintenance Manual

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 Chapter 1. About this manual
This manual contains service and reference information for Lenovo C240/C245/C255 All-In-One computers
listed on the cover. It is intended only for trained servicers who are familiar with Lenovo computer products.

Before servicing a Lenovo product, be sure to read the Safety Information.

The description of the TV-tuner card in this manual applies only to computers with a TV-tuner card installed.
It does not apply to computers without a TV-tuner card.

Important Safety Information

Be sure to read all CAUTION and DANGER sections in this manual before following any of the instructions.

Veuillez lire toutes les consignes de type DANGER et ATTENTION du présent document avant d’exécuter
les instructions.

Lesen Sie unbedingt alle Hinweise vom Typ “ACHTUNG” oder “VORSICHT” in dieser Dokumentation, bevor
Sie irgendwelche Vorgänge durchführen

Leggere le istruzioni introdotte da ATTENZIONE e PERICOLO presenti nel manuale prima di eseguire una
qualsiasi delle istruzioni

Certifique-se de ler todas as instruções de cuidado e perigo neste manual antes de executar qualquer
uma das instruções

Es importante que lea todas las declaraciones de precaución y de peligro de este manual antes de seguir
las instrucciones.

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 2 Lenovo C240/245/255 All-In-One PC Hardware Maintenance Manual

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 Chapter 2. Safety information
This chapter contains the safety information that you need to be familiar with before servicing a computer.

General safety
Follow these rules to ensure general safety:

• Keep the areas around the computer clear and clean during and after maintenance.
• When lifting any heavy object:
1. Ensure you can stand safely without slipping.
2. Distribute the weight of the object equally across both feet.
3. Lift slowly. Never move suddenly or twist when you attempt to lift.
4. Lift by standing or by pushing up with your leg muscles; this action removes the strain from the
muscles in your back.
Do not attempt to lift any objects that weigh more than 16 kg (35 lbs.) or objects that you think
are too heavy for you.
• Do not perform any action that would create a hazard for the customer, or would make the computer
unsafe.
• Before you start the computer, ensure that other service representatives and customer personnel are not
in a position that would create a hazard for them.
• Place removed covers and other parts in a safe place, away from all personnel, while you are servicing the
computer.
• Keep your tool case away from areas that people may walk through to ensure no-one trips over it.
• Do not wear loose clothing that can be trapped in the moving parts of a machine. Ensure that your sleeves
are fastened or rolled up above your elbows. If your hair is long, tie or fasten it back.
• Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip, approximately
8 centimeters (3 inches) from the end.
• Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing.
Remember: Metal objects are good electrical conductors.
• Wear safety glasses when you are: hammering, drilling soldering, cutting wire, attaching springs, using
solvents, or working in any other conditions that might be hazardous to your eyes.
• After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device
that is worn or defective.
• Reattach all covers correctly before returning the computer to the customer.

Electrical safety

CAUTION:
Electrical current from power, telephone, and communication cables can be hazardous. To avoid
personal injury or equipment damage, disconnect any attached power cords, telecommunication
cables, network cables, and modem cables before you open the computer covers, unless instructed
otherwise in the installation and configuration procedures.

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 Observe the following rules when working on electrical equipment.

Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft
material that does not insulate you when working with live electrical currents. Many customers have rubber
floor mats near their equipment that contain small conductive fibers to decrease electrostatic discharge.
• Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical
accident occurs, you can then operate the switch or unplug the power cord quickly.
• Do not work alone under hazardous conditions or near equipment that has hazardous voltages.
• Disconnect all power before:
– Performing a mechanical inspection
– Working near power supplies
– Removing or installing Field Replaceable Units (FRUs)
• Before you start to work on the computer, unplug the power cord. If you cannot unplug it, ask the
customer to power-off the electrical outlet that supplies power to the machine and to lock the electrical
outlet in the off position.
• If you need to work on a computer that has exposed electrical circuits, observe the following precautions:
– Ensure that another person, familiar with the power-off controls, is near you.
Remember: Another person must be there to switch off the power, if necessary.
– Use only one hand when working with powered-on electrical equipment; keep the other hand in your
pocket or behind your back.
Remember: There must be a complete circuit to cause electrical shock. By observing the above rule,
you may prevent a current from passing through your body.
– When using a tester, set the controls correctly and use the approved probe leads and accessories for
that tester.
– Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such as
metal floor strips and machine frames.
Observe the special safety precautions when you work with very high voltages; these instructions are in
the safety sections of the maintenance information. Use extreme care when measuring high voltages.
• Regularly inspect and maintain your electrical hand tools to ensure they are safe to use.
• Do not use worn or broken tools and testers.
• Never assume that power has been disconnected from a circuit. First, check that it has been powered off.
• Always look carefully for possible hazards in your work area. Examples of these hazards are wet floors,
non-grounded power extension cables, conditions that may cause or allow power surges, and missing
safety grounds.
• Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. This surface is
conductive, and touching a live circuit can cause personal injury and damage to the computer.
• Do not service the following parts with the power on when they are removed from their normal operating
positions in a computer:
– Power supply units
– Pumps
– Blowers and fans
– Motor generators
and similar units. (This practice ensures correct grounding of the units.)
• If an electrical accident occurs:
– Use caution; do not become a victim yourself.

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 – Switch off power.
– Send another person to get medical aid.

Safety inspection guide

The intent of this inspection guide is to assist you in identifying potential hazards posed by these products.
Each computer, as it was designed and built, had required safety items installed to protect users and
service personnel from injury. This guide addresses only those items. However, good judgment should be
used to identify potential safety hazards due to attachment of features or options not covered by this
inspection guide.

If any hazards are present, you must determine how serious the apparent hazard could be and whether you
can continue without first resolving the problem.

Consider the following items and the safety hazards they present:
• Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal
electrical shock).
• Explosive hazards, such as a damaged CRT face or bulging capacitor
• Mechanical hazards, such as loose or missing hardware

The guide consists of a series of steps presented as a checklist. Begin the checks with the power off, and
the power cord disconnected.

Checklist:
1. Check exterior covers for damage (loose, broken, or sharp edges).
2. Power-off the computer. Disconnect the power cord.
3. Check the power cord for:
a. A third-wire ground connector in good condition. Use a meter to measure third-wire ground
continuity for 0.1 ohm or less between the external ground pin and frame ground.
b. The power cord should be the appropriate type as specified in the parts listings.
c. Insulation must not be frayed or worn.
4. Remove the cover.
5. Check for any obvious alterations. Use good judgment as to the safety of any alterations.
6. Check inside the unit for any obvious hazards, such as metal filings, contamination, water or other
liquids, or signs of fire or smoke damage.
7. Check for worn, frayed, or pinched cables.
8. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with.

Handling electrostatic discharge-sensitive devices

Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to
electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects.
Protect against ESD damage by equalizing the charge so that the computer, the part, the work mat, and the
person handling the part are all at the same charge.

Notes:
1. Use product-specific ESD procedures when they exceed the requirements noted here.
2. Make sure that the ESD protective devices you use have been certified (ISO 9000) as fully effective.

When handling ESD-sensitive parts:

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 • Keep the parts in protective packages until they are inserted into the product.
• Avoid contact with other people while handling the part.
• Wear a grounded wrist strap against your skin to eliminate static on your body.
• Prevent the part from touching your clothing. Most clothing is insulative and retains a charge even when
you are wearing a wrist strap.
• Use the black side of a grounded work mat to provide a static-free work surface. The mat is especially
useful when handling ESD-sensitive devices.
• Select a grounding system, such as those listed below, to provide protection that meets the specific
service requirement.

Note: The use of a grounding system is desirable but not required to protect against ESD damage.
– Attach the ESD ground clip to any frame ground, ground braid, or green-wire ground.
– Use an ESD common ground or reference point when working on a double-insulated or
battery-operated system. You can use coax or connector-outside shells on these systems.
– Use the round ground-prong of the AC plug on AC-operated computers.

Grounding requirements
Electrical grounding of the computer is required for operator safety and correct system function. Proper
grounding of the electrical outlet can be verified by a certified electrician.

Safety notices
The CAUTION and DANGER safety notices in this section are provided in the language of English.

DANGER

Electrical current from power, telephone and communication cables is hazardous.

To avoid a shock hazard:

• Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration

of this product during an electrical storm.
• Connect all power cords to a properly wired and grounded electrical outlet.
• Connect any equipment that will be attached to this product to a properly wired outlet.
• When possible, use one hand only to connect or disconnect signal cables.
• Never turn on any equipment when there is evidence of fire, water, or structural damage.
• Disconnect the attached power cords, telecommunications cables, network cables, and modem
cables before you open the device covers, unless instructed otherwise in the installation and
configuration procedures.
• Connect and disconnect cables as described in the following table when installing, moving, or
opening covers on this product or attached devices.

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 To Connect To Disconnect
1. Turn everything OFF. 1. Turn everything OFF.
2. First, attach all cables to devices. 2. First, remove power cords from outlets.
3. Attach signal cables to connectors. 3. Remove signal cables from connectors.
4. Attach power cords to outlet. 4. Remove all cables from devices.
5. Turn device ON.

CAUTION:
When replacing the lithium battery, use only Part Number 45C1566 or an equivalent type battery
recommended by the manufacturer. If your system has a module containing a lithium battery, replace
it only with the same module type made by the same manufacturer. The battery contains lithium and
can explode if not properly used, handled, or disposed of.
Do not:
• Throw into or immerse in water
• Heat to more than 100°C (212°F)
• Repair or disassemble

Dispose of the battery as required by local ordinances or regulations.

CAUTION:
When laser products (such as CD-ROMs, DVD-ROM drives, fiber optic devices, or transmitters) are
installed, note the following:

• Do not remove the covers. Removing the covers of the laser product could result in exposure to
hazardous laser radiation. There are no serviceable parts inside the device.
• Use of controls or adjustments or performance of procedures other than those specified herein
might result in hazardous radiation exposure.

DANGER

Some laser products contain an embedded Class 3A or Class 3B laser diode. Note the following:

These diodes emit radiation when open. Do not stare into the beam, do not view directly with
optical instruments, and avoid direct exposure to the beam.

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 ≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs)

CAUTION:
Use safe practices when lifting.

CAUTION:
The power control button on the device and the power switch on the power supply do not turn off
the electrical current supplied to the device. The device also might have more than one power
cord. To remove all electrical current from the device, ensure that all power cords are disconnected
from the power source.

2
1

CAUTION:
Do not place any object weighing more than 82 kg (180 lbs.) on top of rack-mounted devices.

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 Chapter 3. General information
This chapter provides general information that applies to all computer models covered by this manual.

Specifications
This section lists the physical specifications for your computer.

This section lists the physical specifications for your computer.

Type Lenovo C240/C245/C255

This section lists the physical specifications.

Environment

Air temperature:
Operating: 10° to 35°C
Transit: -20° to 55°C

Humidity:
Operating: 35% to 80%
Transit: 20% to 90% (40°C)
Altitude: 86KPa to 106KPa

Electrical input:
Input voltage: 90V-264V(AC)
Input frequency: 47Hz-63Hz

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 Chapter 4. General Checkout
Attention: The drives in the computer you are servicing might have been rearranged or the drive startup
sequence may have been changed. Be extremely careful during write operations such as copying, saving, or
formatting. Data or programs can be overwritten if you select an incorrect drive.

General error messages appear if a problem or conflict is found by an application, the operating system, or
both. For an explanation of these messages, refer to the information supplied with that software package.

Use the following procedure to help determine the cause of the problem:

1. Power-off the computer and all external devices.

2. Check all cables and power cords.
3. Set all display controls to the middle position.
4. Power-on all external devices.
5. Power-on the computer.
• Look for displayed error codes.
• Look for readable instructions or a main menu on the display.

If you did not receive the correct response, proceed to step 6.

If you did receive the correct response, proceed to step 7.
6. If one of the following happens, follow the instruction given:
• If the computer displays a POST error, go to “POST error codes”.
• If the computer hangs and no error is displayed, continue at step 7.
7. If the test stops and you cannot continue, replace the last device tested.

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 Chapter 5. Using the Setup Utility
The Setup Utility program is used to view and change the configuration settings of your computer, regardless
of which operating system you are using. However, the operating system settings might override any similar
settings in the Setup Utility program.

Starting the Lenovo BIOS Setup Utility program

To start the Lenovo BIOS Setup Utility program, do the following:

1. If your computer is already on when you start this procedure, shut down the operating system and
turn off the computer.
2. Press and hold the F1 key then turn on the computer. When the Lenovo BIOS Setup Utility program is
displayed, release the F1 key.

Note: If a Power-On Password or an Administrator Password has been set, the Setup Utility program menu
will not be displayed until you type your password. For more information, see “Using passwords.”

Viewing and changing settings

System configuration options are listed in the Lenovo BIOS Setup Utility program menu. To view or change
settings, see “Starting the Setup Utility program.”

You must use the keyboard when using the Lenovo BIOS Setup Utility menu. The keys used to perform
various tasks are displayed on the bottom of each screen.

Using passwords
You can use the Lenovo BIOS Setup Utility program to set passwords to prevent unauthorized persons
from gaining access to your computer and data. See “Starting the Setup Utility program.” The following
types of passwords are available:
• Administrator Password
• Power-On Password

You do not have to set any passwords to use your computer. However, if you decide to set passwords, read
the following sections.

Password considerations

A password can be any combination of letters and numbers up to 16 characters (a-z and 0-9). For security
reasons, it is a good idea to use a strong password that cannot be easily compromised. We suggest that
passwords should follow these rules:
• For a strong password, use 7-16 characters and a mix of letters and numbers.
• Do not use your name or your user name.
• Do not use a common word or a common name.
• Use something significantly different from your previous password.

Attention: Administrator and Power-On passwords are not case sensitive.

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 Administrator Password

Setting an Administrator Password deters unauthorized persons from changing configuration settings. You
might want to set an Administrator Password if you are responsible for maintaining the settings of several
computers.

After you set an Administrator Password, a password prompt is displayed every time you access the Lenovo
BIOS Setup Utility program.

If both the Administrator and Power-On Password are set, you can type either password. However, you must
use your Administrator Password to change any configuration settings.

Setting, changing, or deleting an Administrator Password

To set an Administrator Password, do the following:

Note: A password can be any combination of letters and numbers up to 16 characters (a-z and 0-9). For
more information, see “Password considerations” on page 13.

1. Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on
page 13).
2. From the Security menu, select Set Administrator Password and press the Enter key.
3. The password dialog box will be displayed. Type the password then press the Enter key.
4. Retype the password to confirm, then press the Enter key. If you typed the password correctly, the
password will be installed. A Setup Notice will be displayed confirming that your changes has been
saved.
5. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.
6. Select Save Changes and Exit from the menu.

To change an Administrator Password, do the following:

1. Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on
page 13).
2. From the Security menu, select Set Administrator Password and press the Enter key.
3. The password dialog box will be displayed. Type the current password then press the Enter key.
4. Type the new password, then press the Enter key. Retype the new password to confirm it. If you typed
the new password correctly, the new password will be installed. A Setup Notice will be displayed
confirming that your changes have been saved.
5. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.
6. Select Save Changes and Exit from the menu.

To delete a previously set Administrator Password, do the following :

1. Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on
page 13).
2. From the Security menu, select Set Administrator Password and press the Enter key.
3. The password dialog box will be displayed. Type the current password and press the Enter key.
4. Leave each new password line item blank, then press the Enter key. A Setup Notice will be displayed
confirming that your changes have been saved.
5. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.
6. Select Save Changes and Exit from the menu.

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 Power-On Password

When a Power-On Password is set, you cannot start the Lenovo BIOS Setup Utility program until a valid
password is typed from the keyboard.

Setting, changing, or deleting a Power-On Password

Note: A password can be any combination of letters and numbers up to 16 characters (a-z and 0-9).

To set a Power-On Password, do the following:

1. Start the Lenovo BIOS Setup Utility program (see ”Starting the Lenovo BIOS Setup Utility program” on
page 13).
2. From the Security menu, select Set Power-On Password and press the Enter key.
3. The password dialog box will be displayed. Type the password, then press the Enter key.
4. Retype the password to confirm. If you typed the password correctly, the password will be installed.
5. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.
6. Select Save Changes and Exit from the menu.

To change a Power-On Password, do the following:

1. Start the Lenovo BIOS Setup Utility program (see ”Starting the Lenovo BIOS Setup Utility program” on
page 13).
2. From the Security menu, select Set Power-On Password and press the Enter key.
3. The password dialog box will be displayed. Type the current password then press the Enter key.
4. Type the new password, then press the Enter key. Retype the new password to confirm it. If you typed
the new password correctly, the new password will be installed. A Setup Notice will be displayed
confirming that your changes have been saved.
5. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.
6. Select Save Changes and Exit from the menu.

To delete a previously set Power-On Password, do the following :

1. Start the Lenovo BIOS Setup Utility program (see ”Starting the Lenovo BIOS Setup Utility program” on
page 13).
2. From the Security menu, select Set Power-On Password and press the Enter key.
3. The password dialog box will be displayed. Type the current password and press the Enter key.
4. Leave each new password line item blank, then press Enter. A Setup Notice will be displayed confirming
that your changes have been saved.
5. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.
6. Select Save Changes and Exit from the menu.

Enabling or disabling a device

The Devices options is used to enable or disable user access to the following:
USB Functions Select whether to enable or disable USB (Universal Serial
Bus) functions. If the functions are disabled, no USB
devices can be used.

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 SATA Mode Select Disabled/IDE/AHCI mode. Device driver support
is required for AHCI or RAID. Depending on how the hard
disk drive image was installed, changing this setting may
prevent the system from booting.
Onboard Audio Controller Select whether to enable or disable the Onboard
Audio Controller. When this feature is set to Disabled
all devices connected to the audio connectors (e.g.
headphones or a microphone) are disabled and cannot
be used.
Onboard Ethernet Controller or LAN Boot Agent Select whether to enable or disable the Onboard Ethernet
Controller, or select whether to enable or disable load
onboard PXE (Preboot Execution Environment).

To enable or disable a device, do the following:

1. Start the Setup Utility program (see “Starting the Setup Utility program” on page 13).
2. From the Setup Utility program menu, select Devices.
3. Select an option as follows:
Select USB Setup, press the Enter key, then select USB Functions.
Select ATA Drivers Setup, press the Enter key, then select SATA Mode.
Select Audio Setup, press the Enter key, then select Onboard Audio Controller.
Select Network Setup, press the Enter key, then select Onboard Ethernet Support or LAN Boot
Agent.
4. Select Disabled or Enabled and press the Enter key.
5. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.
6. Select Save Changes and Exit from the menu.

Notes:
a. If you do not want to save the settings, select Discard Changes and Exit from the menu.

Selecting a startup device

If your computer does not boot from a device such as the CD/DVD-ROM drive disk or hard disk as expected,
follow one of the procedures below.

Selecting a temporary startup device

Use this procedure to start up from any boot device.

Note: Not all CDs, DVDs or hard disk drives are bootable.
1. Turn off your computer.
2. Press and hold the F12 key then turn on the computer. When the Startup Device Menu appears,
release the F12 key.

Note: If the Startup Device Menu does not display using these steps, repeatedly press and release the
F12 key rather than keeping it pressed when turning on the computer.
3. Use ↑ and ↓ arrows to select the desired startup device from the Startup Device Menu and press
the Enter key to begin.

Note: Selecting a startup device from the Startup Device Menu does not permanently change the
startup sequence.

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 Selecting or changing the startup device sequence

To view or permanently change the configured startup device sequence, do the following:
1. Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on
page 13).
2. From the Lenovo BIOS Setup Utility program main menu, select the Startup option.
3. Press the Enter key, and select the devices for the Primary Boot Sequence. Read the information
displayed on the right side of the screen.
4. Use - and ¯ arrows to select a device. Use the <+> or <-> keys to move a device up or down. Use the
<×> key to exclude the device from or include the device in the boot sequence.
5. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.
6. Select Save Changes and Exit from the menu.

Notes:
a. If you do not want to save the settings, select Discard Changes and Exit from the menu.
b. If you have changed these settings and want to return to the default settings, select Load Optimal
Defaults from the menu.

Changing booting mode

There are two boot modes UEFI and Legacy for your computer. The default boot mode for your computer is
the UEFI mode. If you need to install a legacy Windows operating system (any operating system before
Windows 8) on your computer, you must change the boot mode to Legacy support. The legacy Windows
operating system cannot be installed if you don’t change the boot mode.

To change the booting mode, do the following:

1. Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on
page 13).
2. From the Lenovo BIOS Setup Utility program main menu, select the Startup option.
3. Select the Boot Priority, then press Enter key. From the pop up “Boot Priority” window choose
Legacy mode.
4. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.
5. Select Save Changes and Exit from the menu.

Exiting the Lenovo BIOS Setup Utility program

After you finish viewing or changing settings, press the Esc key to return to the Lenovo BIOS Setup Utility
program main menu. You might have to press the Esc key several times. Do one of the following:
• If you want to save the new settings, select Save Changes and Exit from the menu. When the Save
& reset window shows, select the Yes button, and then press the Enter key to exit the Lenovo BIOS
Setup Utility program.
• If you do not want to save the settings, select Discard Changes and Exit from the menu. When the
Reset Without Saving window shows, select the Yes button, and then press the Enter key to exit the
Lenovo BIOS Setup Utility program.

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 Chapter 6. Symptom-to-FRU Index
The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first.
Always begin with Chapter 4, “General Checkout,” on page 11. This index can also be used to help you
decide which FRUs to have available when servicing a computer. If you are unable to correct the problem
using this index, go to “Undetermined problems” on page 20.

Notes:
• If you have both an error message and an incorrect audio response, diagnose the error message first.
• If you cannot run the diagnostic tests or you get a diagnostic error code when running a test but did
receive a POST error message, diagnose the POST error message first.
• If you did not receive any error message look for a description of your error symptoms in the first part of
this index.

Hard disk drive boot error

A hard disk drive boot error can have the following causes.

Error FRU/Action
The startup drive is not included in the boot sequence Check the configuration and ensure the startup drive is
configuration. in the boot sequence.
No operating system is installed on the boot drive. Install an operating system on the boot drive.
The boot sector on the startup drive is corrupted. The drive must be formatted. Do the following:
1. Attempt to back up the data on the failing hard disk
drive.
2. Use the operating system to format the hard disk
drive.
The drive is defective. Replace the hard disk drive.

Power Supply Problems

Follow these procedures if you suspect there is a power supply problem.

Check/Verify FRU/Action
Check that the following are properly installed: Reseat connectors
• Power Cord
• On/Off Switch connector
• System Board Power Supply connectors
• Microprocessor connections
Check the power cord. Power Cord
Check the power-on switch. Power-on Switch

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 POST error codes
Each time you turn the computer on, it performs a series of tests to check that the system is operating
correctly and that certain options are set. This series of tests is called the Power-On Self-Test, or POST.
POST does the following:
• Checks some basic motherboard operations
• Checks that the memory is working correctly
• Starts video operations
• Verifies that the boot drive is working

POST Error Message Description/Action

Keyboard error Cannot initialize the keyboard. Make sure the keyboard
is properly connected to the computer and that no keys
are held pressed during POST. To purposely configure
the computer without a keyboard, select Keyboardless
operation in Startup and set the option to Enabled. The
BIOS then ignores the missing keyboard during POST.
Reboot and Select proper Boot device or Insert Boot The BIOS was unable to find a suitable boot device. Make
Media in selected Boot device sure the boot drive is properly connected to the computer.
Make sure you have bootable media in the boot device.

Undetermined problems
1. Power-off the computer.
2. Remove or disconnect the following components (if connected or installed) one at a time.
a. External devices (modem, printer, or mouse)
b. Extended video memory
c. External Cache
d. External Cache RAM
e. Hard disk drive
f. Disk drive
3. Power-on the computer to re-test the system.
4. Repeat steps 1 through 3 until you find the failing device or component.

If all devices and components have been removed and the problem continues, replace the system board.

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 Chapter 7. Locating connectors, controls and components
This section provides illustrations to help locate the various connectors, controls and components of the
computer.

Front view
The following illustration shows the location of controls and components on the front of the computer.

Attention: Be careful not to block any air vents on the computer. Blocked air vents can cause overheating.

1. Built-in microphone 6. Volume down

2. Built-in camera 7. Volume up
3. System Power On/Off indicator 8. Brightness down
4. Hard disk drive indicator 9. Brightness up
5. Wi-Fi status indicator

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 Left and right view
The following illustration shows the location of connectors, controls and components on the left and right
side of the computer.

1 2

3
4

5
6

1. Optical drive 4. Microphone connector

2. Memory card reader 5. Headphone connector
3. USB 3.0 connectors (selected models only) 6. Power button

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 Rear view
The following illustration shows the location of connectors and components on the rear of the computer.

1 2 3 4

1. Power connector 4. Ethernet connector

2. HDMI-out connector (selected models only) 5. Air vents
3. USB 2.0 connectors (selected models only)

Chapter 7. Locating connectors, controls and components 23

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 Hardware components
The following illustration shows the components that make up your computer.

9
1

10

2
11

3 12

4 13

7
14

8
15

1. Front bezel 9. Camera

2. Motherboard 10. Converter board bracket
3. EMI shielding 11. Converter board
4. Optical drive 12. Heat-sink module
5. Front indicator board 13. System fan
6. Power switch board 14. Hard disk drive
7. Speaker system 15. Computer stand
8. Rear cover

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 Identifying parts on the motherboard
The motherboard (sometimes called the planar or system board) is the main circuit board in your computer.
It provides basic computing functions and supports a variety of devices that are factory-installed or that
can be installed later. The following illustration shows the location of connectors and components on
the front of the motherboard.

1 2 3

9 8

1. LVDS cable connector 6. TV-Tuner card port

2. CPU 7. Power switch cable connector
3. Memory slots 8. Front indicator board cable connector
4. System fan connector 9. Speaker cable connector
5. Wi-Fi card port

Chapter 7. Locating connectors, controls and components 25

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 Chapter 8. Replacing hardware
Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety information”
in the Safety and Warranty Guide that was included with your computer. To obtain copies of the Safety and Warranty
Guide, go to the Support Web site at: http://support.lenovo.com.

Note: Use only parts provided by Lenovo.

General information
Pre-disassembly instructions

Before starting the disassembly procedure, make sure that you do the following:
1. Turn off the power to the system and all peripherals.
2. Unplug all power and signal cables from the computer.
3. Place the system on a flat, stable surface.

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 Replacing the keyboard and mouse
To replace the keyboard and mouse:

Step 1. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.

Note: Your keyboard will be connected to a USB connector on one side or at the rear of the
computer.
Step 4. Disconnect the defective keyboard cable from the computer and connect the new keyboard cable
to the same connector.

Note: The mouse can be replaced using the same method.

Replacing the optical drive

Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before replacing the optical drive.
To replace the optical drive:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.

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 Step 4. Push a small iron stick (paper clip) into the small hole on the optical drive cover so that the disk
springs out as shown. 1
Step 5. Remove the screw that secures the optical drive to the chassis. 2

Step 6. Slide out the optical drive as shown. 3

Step 7. Use a small flat head screwdriver to press and push out the pins that secure the cover to the
disk. 4 5
Step 8. Separate the cover from the defective optical drive.

Step 9. Install the new optical drive as follows:

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 a. Align the new optical drive with the cover, and then push the cover back into position.
b. Slide the new optical drive into the drive bay, then push it into position.
c. Secure the optical drive to the chassis using the screw.

Replacing the power adapter

To replace the power adapter:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Locate the connector for the power cord. Refer to “Rear view”.
Step 3. Disconnect the failing power adapter from the computer.

Step 4. To install the new power adapter:

a. Connect the new power adapter to the same connector.

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 Removing the rear cover
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo
recommends that you use a blanket, towel, or other soft cloth to protect the touch screen from scratches
or other damage.
To remove the rear cover:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the 5 screws that secure the rear cover to the front bezel.
Step 5. Slide down the rear cover as shown to separate the rear cover from the front bezel.

Step 6. Lift the rear cover from the bottom edge as shown.
Step 7. Disconnect the LVDS cable to separate the rear cover from the front bezel.

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 Step 8. To reattach the rear cover:
a. Line up the rear cover with the front bezel and reconnect the LVDS cable.
b. Line up the holes on the rear cover with mounting holes on the front bezel, and place the rear
cover into position.
c. Secure the rear cover to the front bezel with the 5 screws.

Replacing a memory module

Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace a memory module:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to “Removing the rear cover”.
Step 5. Push out the latches on both sides of the memory socket to release the memory module. 1 Gently
pull the memory module upward to remove it from its socket. 2

2
1

Step 6. To install the new memory module:

a. Align the new memory module with the memory socket, then insert it and push down on
the top edge.
b. Make sure the latches lock the memory module in place.
Step 7. Reattach the rear cover and secure it with the screws.

Replacing the hard disk drive

Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the hard disk drive:

Step 1. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.

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 Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to "Removing the rear cover".
Step 5. Remove the 4 screws that secure the hard disk drive to the rear cover.
Step 6. Disconnect the data and power cable from the hard disk drive. 1
Step 7. Lift up the hard disk drive to remove it. 2

Step 8. Remove the 4 screws that secure the hard disk drive to the bracket.
Step 9. To install the new hard disk drive:
a. Attach the bracket pieces to the new hard disk drive, and secure them with the 4 screws.
b. Slide the new hard disk drive into the hard disk drive bay.
c. Secure the new hard disk drive to the rear cover with the 4 screws.
d. Connect the data and power cables to the new hard disk drive.
Step 10. Reattach the rear cover and secure it with the screws.

Replacing the heat-sink

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the heat-sink:

Step 1. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to "Removing the rear cover".

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 Step 5. Remove the 4 screws that secure the heat-sink module to the motherboard.
Step 6. Lift up the heat-sink to remove it.

Attention: Place the heat-sink upside down on a flat surface to prevent thermal grease contaminating
other components.

Step 7. To install the new heat-sink:

a. Use an alcohol pad to wipe the thermal grease off the CPU.
b. Line up the new heat-sink module with the mounting holes on the motherboard.
c. Secure the new heat-sink to the motherboard with the screws, making sure to fit the screws in
sequence following the numbers printed on the new heat-sink.
d. Use the adhesive tape to seal the gap between the heat-sink and system fan.
Step 8. Reattach the rear cover and secure it with the screws.

Replacing the system fan

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the system fan:

Step 1. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to "Removing the rear cover".

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 Step 5. Disconnect the power cable from the connector on the motherboard. 1
Step 6. Remove the 2 screws that secure the system fan to the rear cover.
Step 7. Lift up the system fan to remove it. 2

Step 8. To install the new system fan:

a. Line up the new system fan with the mounting holes on the rear cover and place it into position.
b. Secure the new system fan to the rear cover with the 2 screws.
c. Connect the new power cable to the connector on the motherboard.
Step 9. Reattach the rear cover and secure it with the screws.

Replacing the Wi-Fi card

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the Wi-Fi card:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to "Removing the rear cover".

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 Step 5. Disconnect the antenna and data cables from the Wi-Fi card. 1
Step 6. Remove the screw that secures the Wi-Fi card to the motherboard. 2
Step 7. Pull the Wi-Fi card upward to remove it from the socket. 3

1
2

Step 8. To install the new Wi-Fi card:

a. Insert the new Wi-Fi card into the card port and secure it with the screw.
b. Connect the antenna cables to the new Wi-Fi card.
Step 9. Reattach the rear cover and secure it with the screws.

Replacing the speaker system

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the speaker system:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to "Removing the rear cover".

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 Step 5. Disconnect the speaker cable from the connector on motherboard. 1
Step 6. Detach the speaker system from the rubber screws. 2 3

22

Step 7. To install the new speaker system:

a. Secure the new speaker system to the chassis with the rubber screws.
b. Connect the new speaker cable to the connector on the motherboard.
Step 8. Reattach the rear cover and secure it with the screws.

Replacing the front indicator board

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the front indicator board:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to "Removing the rear cover".

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 Step 5. Disconnect the data cable from the front indicator board. 1
Step 6. Remove the 2 screws that secure the front indicator board to the rear cover. 2
Step 7. Lift up the front indicator board to remove it.

Step 8. To install the new front indicator board:

a. Line up the front indicator board with the mounting holes on the rear cover and secure
it with the 2 screws.
b. Connect the data cable to the connector on the motherboard.
Step 9. Reattach the rear cover and secure it with the screws.

Replacing the power switch board

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the power switch board:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to "Removing the rear cover".

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 Step 5. Disconnect the power switch board cable from the connector on the motherboard. 1
Step 6. Remove the screw that secures the power switch board to the rear cover and lift up the power
switch board to remove it. 2

Step 7. To install the power switch board:

a. Line up the holes on the new power switch board with the mounting holes on the rear cover
and secure the new power switch board with the screws.
b. Connect the data cable to the connector on the new motherboard.
Step 8. Reattach the rear cover and secure it with the screws.

Replacing the motherboard

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the motherboard:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to “Removing the rear cover”.
Step 5. Remove all memory modules. Refer to “Replacing a memory module”.
Step 6. Remove the heat-sink. Refer to “Replacing the heat-sink”.
Step 7. Remove the Wi-Fi card. Refer to “Replacing the Wi-Fi card”.

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 Step 8. Remove all the cables connected to the motherboard. 1 2 3 4 5 6

1
2
3
4
5

Step 9. Remove the 7 screws that secure the motherboard to the rear cover and lift it up to remove it. 1

Step 10. To install the new motherboard:

a. Insert the notched end of the Wi-Fi card into the card port on the new motherboard and
secure it with the screw.
b. Connect the antenna cable(s) to the Wi-Fi card.
c. Line up the holes on the new motherboard with the mounting holes on the rear cover and
secure the new motherboard with the 7 screws.
d. Attach the heat-sink, Wi-Fi card, memory modules to the new motherboard.
e. Connect all the cables to the new motherboard.
Step 11. Reattach the rear cover and secure it with the screws.

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 Replacing the computer stand
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the computer stand:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to “Removing the rear cover”.
Step 5. Remove the system fan. Refer to “Replacing the system fan”.
Step 6. Remove the 6 screws that secure the computer stand to the rear cover. 1
Step 7. Slide out the system fan supporting bracket.
Step 8. Slide out the computer stand as shown. 2

Step 9. To install the new computer stand:

a. Line up the computer stand with the mounting hole on the rear cover and slide it into position.
b. Line up the system fan supporting bracket with mounting hole on the new computer stand.
c. Secure the new computer stand to the rear cover with the 6 screws.
d. Reattach the system fan.
Step 10. Reattach the rear cover and secure it with the screws.

Replacing the camera

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the camera:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.

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 Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to “Removing the rear cover”.
Step 5. Remove the 2 screws that secure the camera to the front bezel. 1
Step 6. Lift up the camera 2 and disconnect the data cable from the camera. 3

2 1

Step 7. To install the new camera:

a. Connect the data cable to the new camera.
b. Line up the holes in the new camera with the mounting holes on the front bezel and secure
the new camera with the 2 screws.
Step 8. Reattach the rear cover and secure it with the screws.

Replacing the converter board

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the converter board:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to “Removing the rear cover”.

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 Step 5. Disconnect the 2 cables from the converter board. 1
Step 6. Remove the 2 screws that secure the converter board to the bracket. 2
Step 7. Lift up the converter board to remove it. 3

2
2

3
1
1

Step 8. To install the new converter board:

a. Line up the holes in the new converter board with the mounting holes on the bracket and
secure the new converter board with the 2 screws.
b. Connect the 2 cables to the new converter board.
c. A converter jumper reset is required, refer to the diagram on “Replacing the LED panel”.
Step 9. Reattach the rear cover and secure it with the screws.

Replacing the LED panel

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the LED panel:

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the rear cover. Refer to “Removing the rear cover”.
Step 5. Remove the converter board. Refer to “Replacing the converter board”.

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 Step 6. Remove the 2 screws that secure the converter bracket to the front bezel. 1 Lift up the bracket
to remove it. 2
1
2
1

Step 7. Remove the tape that secures the LVDS cable to the connector.
Step 8. Press the pins to unlock the LVDS cable from the connector on the LED panel 1 , then pull it
out as shown. 2
Step 9. Press the pin to unlock the converter cable from the connector on the LED panel 3 , then pull
the converter cable out as shown. 4

3
1
2

Step 10. Remove the 2 screws that secure the LED panel to the front bezel.

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 Step 11. The LED panel is pined to the front bezel. Pull the pins outward to release it 1 , then slide out
the LED panel out as shown. 2 3

Step 12. To install the new the LED panel:

a. Line up the new LED panel with the front bezel, then slide it into position.
b. Secure the LED panel to the front bezel with the 2 screws.
c. Attach all the cables to the new LED panel.
d. Reattach the converter bracket to the front bezel.
e. Reattach the converter board to the bracket.
f. A converter jumper setting is required after replacing the old panel with a new panel. Follow the
below diagram to insert the jumper heads to the pins properly depending on the panel brands:

PJP6 PJP7

Jumper Head s

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 Panel Brand PJP 6 Setting PJP 7 Setting

LG(18.5'' )-LM185WH2-TLK1

CMI(18.5'')-M185BGE-L23

AUO(18.5'')-M185XTN01.3

BOE(18.5'')-B3 HT185WX1-300

Step 13. Reattach the rear cover and secure it with the screws.

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 Chapter 9. FRU lists-C240–245
This chapter lists the information on the field replaceable units (FRUs) for Lenovo C240–245 All-In-One
desktop computers.

Attention: Be sure to read and understand all the safety information before replacing any FRUs.

Notes: FRUs that have a 1 or 2 in the CRU column are Customer Replaceable Units (CRUs).
• 1– identifies parts that are fairly simple to replace, requiring few or no tools.
• 2– identifies parts that are slightly more difficult to replace.
• N-identifies parts that are not to be replaced by the customer.

9
1

10

2
11

3 12

4 13

7
14

8
15

Description Service Part CRU

Item#
Number (FRU) ID
1 Front bezel
C240 FRONT BEZEL(BLACKE) 90202143 N
C240 FRONT BEZEL(WHITE) 90202144 N

2 Motherboard

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 C240 NOK CPU_847 MB 90001861 N
C240 NOK CPU_807 MB 90001862 N
C240 W8P CPU_847 MB 90001863 N
C240 W8P CPU_807 MB 90001864 N
C240 W8S CPU_847 MB 90001865 N
C240 W8S CPU_807 MB 90001866 N
C245 NOK UMA CPU_E2-1800 1.7G MB 90001852 N
C245 NOK UMA CPU_E1-1200 1.4G MB 90001853 N
C245 NOK UMA CPU_E-450 1.65G MB 90001854 N
C245 W8P UMA CPU_E2-1800 1.7G MB 90001855 N
C245 W8P UMA CPU_E1-1200 1.4G MB 90001856 N
C245 W8P UMA CPU_E-450 1.65G MB 90001857 N
C245 W8S UMA CPU_E2-1800 1.7G MB 90001858 N
C245 W8S UMA CPU_E1-1200 1.4G MB 90001859 N
C245 W8S UMA CPU_E-450 1.65G MB 90001860 N
C245 NOK UMA CPU_E-350D 1.6G MB 90002219 N
C245 W8P UMA CPU_E-350D 1.6G MB 90002220 N
C245 W8S UMA CPU_E-350D 1.6G MB 90002221 N

3 EMI shielding
C245 MB SHIELDING 90202167 N
4 Optical drive
PLDS DS-8A8SH 25201487 2
HLDS GT50N 25201635 2
PLDS DS-8A9SH 25209016 2
HLDS GT80N 25209015 2

5 Front indicator board

C240 LED BAORD W/FFC 90001851 N

6 Power switch board

C240/5 FUNCTION POWER BOARD W/FFC 90001850 N

7 Speaker system
C240/5 SPEAKER W/RUBBER*2 90202138 N

8 Rear cover

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 C240 REAR COVER W/ODD (BLACK) 90202161 N
C240 REAR COVER W/ODD (WHITE) 90202162 N
C240 REAR COVER W/O ODD (BLACK) 90202212 N
C240 REAR COVER W/O ODD (WHITE) 90202213 N

9 Camera
Bison M720P VC OV9712 CAM 20200085 N
CCY M720P VC OV9712 CAM 20200086 N

10 Converter board bracket

C240/5 CONVERTER BRACKET 90202142 N

11 Converter board
C240 CONVERTER BOARD For CMI 90001846 N
C240 CONVERTER BOARD For AUO 90001847 N
C240 CONVERTER BOARD For LG 90001848 N
C240 CONVERTER BOARD For BOE 90001849 N

12 Heat-sink module
C240 UMA COOLERMASTER THERMAL 90202151 N
C240 UMA AVC THERMAL 90202152 N

13 System fan
C240 DELTA FAN 90202149 N
C240 SUNON FAN 90202150 N

14 Hard disk drive

WD XL500A WD2500AAKX-08ERMA0 250G16M7200 16200245 N
SATA6GHDD-LH
Seagate Pharaoh 4K ST250DM000 250G HDD-LH 16200176 N
WD XL500A 6G WD5000AAKX-08ERMA0 16200247 N
SGT Pharaoh 4K ST500DM002 500G HDD-LH 16200178 N
SGT Grenada ST1000DM003 1TB HDD-LH 16200182 N
Seagate Grenada BP ST1000DM003 16200293 N
WD XL1000S WD10EZEX-08RKKA0 16200292 N

15 Computer stand

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 C240 STAND (BLACK) 90202158 N
C240 STAND (WHITE) 90202159 N

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 Chapter 10. FRU lists-C255
This chapter lists the information on the field replaceable units (FRUs) for Lenovo C255 All-In-One desktop
computer.

Attention: Be sure to read and understand all the safety information before replacing any FRUs.

Notes: FRUs that have a 1 or 2 in the CRU column are Customer Replaceable Units (CRUs).
• 1– identifies parts that are fairly simple to replace, requiring few or no tools.
• 2– identifies parts that are slightly more difficult to replace.
• N-identifies parts that are not to be replaced by the customer.

9
1

10

2
11

3 12

4 13

7
14

8
15

Item # Name Part Description (English) FRU PN CRU

ID

2 Mainboard C255 NOK UMA CPU_E1-2500 1.4G 15W MB 90003560 N

C255 W8P UMA CPU_E1-2500 1.4G 15W MB 90003564 N
C255 W8S UMA CPU_E1-2500 1.4G 15W MB 90003568 N
13 System Fan C240 DELTA FAN 90202149 N
C240 SUNON FAN 90202150 N
12 Heatsink C240 UMA COOLERMASTER THERMAL 90202151 N
C240 UMA AVC THERMAL 90202152 N

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 7 Speaker C240 SPEAKER W/RUBBER*2 90202138 N
11 Converter board C240 CONVERTER BOARD For CMI 90001846 N
C240 CONVERTER BOARD For AUO 90001847 N
C240 CONVERTER BOARD For BOE 90001849 N
Function Board C240 FUNCTION POWER BOARD W/FFC 90001850 N
5 LED Board C240 LED BAORD W/FFC 90001851 N
Cables Cables C240 CABLE_CAMERA_CONVERTER_LVDs 90202145 N
C240 CONVERTER CABLE 90202146 N
C240 HDD CABLE 90202148 N
C255ODD CABLE 90203732 N
Antenna Antenna C240 WLAN ANTENNA 90202160 N
Mechenical
10 Converter bracket C240 CONVERTER BRACKET 90202142 N
1 Front bezel C240 FRONT BEZEL W/Camera (BLACK) 90202143 N
C240 FRONT BEZEL W/Camera (WHITE) 90202144 N
C240 FRONT BEZEL W/O Camera (BLACK) 90202525 N
C240 FRONT BEZEL W/O Camera (WHITE) 90202526 N
C240 HDD BRACKET 90202147 N
C240 HDD SHIELDING 90202425 N
C240 ODD DOOR (BLACK) 90202153 N
C240 ODD DOOR (WHITE) 90202154 N
C240 ODD BRACKET 90202155 N
15 Computer stand C240 STAND (BLACK) 90202158 N
C240 STAND (WHITE) 90202159 N
8 Rear cover C240 REAR COVER W/ODD (BLACK) 90202161 N
C240 REAR COVER W/ODD (WHITE) 90202162 N
C240 REAR COVER W/O ODD (BLACK) 90202212 N
C240 REAR COVER W/O ODD (WHITE) 90202213 N
Foot C240 RUBBER FOOT BLACK(L) 90202163 N
C240 RUBBER FOOT BLACK(R) 90202164 N
C240 RUBBER FOOT WHITE(L) 90202165 N
C240 RUBBER FOOT WHITE(R) 90202166 N
3 EMI cover C245 MB SHIELDING 90202167 N

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 RAM 2GB M471B5773DH0-YK0 2GB D3L-1600S MEMORY 1100642 N
HMT425S6AFR6A-PB 2GB D3L-1600S MEMORY 1100643 N
MT8KTF25664HZ-1G6M1 2GB D3L-1600SMEMORY 1100228 N
Ramaxel Elp_R J2108EDBG-GN-F 2GB D3L-1600S 1100750 N
Mic_S D9PFJ 2GB D3L-1600S MEMORY 1100683 N
4GB M471B5273DH0-YK0 4G D3L-1600S MEMORY 1100637 N
HMT451S6AFR8A-PB 4G D3L-1600S MEMORY 1100638 N
MT8KTF51264HZ-1G6J1 4G D3L-1600S MEMORY 1100639 N
Elp_R J4208EBBG-GN-F 4GB D3L-1600S MEMORY 1100640 N
Mic_S D9QVG 4GB D3L-1600S MEMORY 1100672 N
M471B5173QH0-YK0 4GB D3L-1600S MEMORY-HF 1100906 N
M471B5173DB0-YK0 4GB D3L-1600S MEMORY-HF 1100942 N
14 250G WDXL500A WD2500AAKX-08ERMA0 250G HDD-LH 16200245 N
SGT Pharaoh 4K ST250DM000 250G HDD-LH 16200176 N
WDXL500A WD2500AAKX-08U6AA0 250G HDD-LH 16200542 N
500G WDXL500A WD5000AAKX-08ERMA0 500G HDD-LH 16200247 N
SGT Pharaoh 4K ST500DM002 500G HDD-LH 16200178 N
WDXL500A WD5000AAKX-08U6AA0 500G HDD-LH 16200544 N
TSB Mars 4K 500G DT01ACA050 -LH 16200512 N
1TB WD XL1000S WD10EZEX-08RKKA0 1TB HDD-LH 16200292 N
SGT Grenada BP ST1000DM003 1TB HDD-LH 16200293 N
3.5inch SATA6G 7.2K Grenada BP 1.5 1TB 16200528 N
TSB Mars 4K 1TB DT01ACA100 -LH 16200513 N
4 ODD HLDS GT80N Slim SATA Rambo光驱无面板-LH 25209015 N

PLDS DS-8A9SH Slim Tray Rambo无面板-LH 25209016 N

Panel 250nits CMI 18.5"WLED M185BGE-L22 90400100 N
AUO M185XTN01.2 90400101 N
BOE: HT185WX1-300 90400192 N
200nits AUO M185XTN01.3 90400141 N
CMI M185BGEL23 90400147 N
Adapter Adapter Liteon PA-1650-52LC NB ADA[TER (EPS2.0) 36001678 N
Delta ADP-65YB DA 65W ADAPTER ( R) 36200337 N
Wi-Fi card Wi-Fi card CBT AR9485 11n HMC WiFi card 11200354 N
LTN RTL8188EE 11n HMC WiFi card 20200218 N
9 720P Bison M720P VC OV9726 CAM 20200377 N
AVC M720P RT OV9726 CAM 20200457 N
0.3M Bison MI360 new lens NF CAM(R) 20200327 N
CCY VC346 V7725 NR Cam 20200515 N

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 Keyboard Keyboard Sunrex EKB-10YA(US) B-Silk USB KB-LVT8 25209111 1
Primax KB4721(US) B-Silk USB KB-LVT8 25209112 1
Chicony Black Silk KB 25209113 1
Sunrex EKB-10YA(TW) B-Silk USB KB-LVT8 25209114 1
Sunrex EKB-10YA(TH) B-Silk USB KB-LVT8 25209115 1
Sunrex EKB-10YA(CZ-SL) B-S USB KB-LVT8 25209116 1
Sunrex EKB-10YA(IN) B-Silk USB KB-LVT8 25209117 1
Sunrex EKB-10YA(RU) B-Silk USB KB-LVT8 25209118 1
Sunrex EKB-10YA(UK) B-Silk USB KB-LVT8 25209119 1
Sunrex EKB-10YA(Nordic) B-S USB KB-LVT8 25209120 1
Sunrex EKB-10YA(LA) B-Silk USB KB-LVT8 25209121 1
Sunrex EKB-10YA(AR) B-Silk USB KB-LVT8 25209122 1
Sunrex EKB-10YA(SW) B-Silk USB KB-LVT8 25209123 1
Sunrex EKB-10YA(GE) B-Silk USB KB-LVT8 25209124 1
Sunrex EKB-10YA(TR) B-Silk USB KB-LVT8 25209125 1
Sunrex EKB-10YA(SP) B-Silk USB KB-LVT8 25209126 1
Sunrex EKB-10YA(SL) B-Silk USB KB-LVT8 25209127 1
Sunrex EKB-10YA(IT) B-Silk USB KB-LVT8 25209128 1
Sunrex EKB-10YA(HB) B-Silk USB KB-LVT8 25209129 1
Sunrex EKB-10YA(FR) B-Silk USB KB-LVT8 25209130 1
Sunrex EKB-10YA(GK) B-Silk USB KB-LVT8 25209131 1
Sunrex EKB-10YA(HG) B-Silk USB KB-LVT8 25209132 1
Sunrex EKB-10YA(BG) B-Silk USB KB-LVT8 25209133 1
Sunrex EKB-10YA(HR) B-Silk USB KB-LVT8 25209134 1
Sunrex EKB-10YA(JP) B-Silk USB KB-LVT8 25209135 1
Sunrex EKB-10YA(EN-FR) B-S USB KB-LVT8 25209136 1
Sunrex EKB-10YA(PT) B-Silk USB KB-LVT8 25209137 1
Sunrex EKB-10YA(BE-EN) B-S USB KB-LVT8 25209138 1
Sunrex EKB-10YA(DU) B-S USB KB-LVT8 25209139 1
Sunrex EKB-10YA(US) W-Silk USB KB-LVT8 25209145 1
Primax KB4721(US) W-Silk USB KB-LVT8 25209146 1
Sunrex EKB-10YA(TW) W-Silk USB KB-LVT8 25209147 1
Sunrex EKB-10YA(TH) W-Silk USB KB-LVT8 25209148 1
Sunrex EKB-10YA(CZ-SL) W-S USB KB-LVT8 25209149 1
Sunrex EKB-10YA(IN) W-Silk USB KB-LVT8 25209150 1
Sunrex EKB-10YA(RU) W-Silk USB KB-LVT8 25209151 1
Sunrex EKB-10YA(UK) W-Silk USB KB-LVT8 25209152 1
Sunrex EKB-10YA(Nordic) W-S USB KB-LVT8 25209153 1
Sunrex EKB-10YA(LA) W-Silk USB KB-LVT8 25209154 1
Sunrex EKB-10YA(AR) W-Silk USB KB-LVT8 25209155 1

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 Sunrex EKB-10YA(SW) W-Silk USB KB-LVT8 25209156 1
Sunrex EKB-10YA(GE) W-Silk USB KB-LVT8 25209157 1
Sunrex EKB-10YA(TR) W-Silk USB KB-LVT8 25209158 1
Sunrex EKB-10YA(SP) W-Silk USB KB-LVT8 25209159 1
Sunrex EKB-10YA(SL) W-Silk USB KB-LVT8 25209160 1
Sunrex EKB-10YA(IT) W-Silk USB KB-LVT8 25209161 1
Sunrex EKB-10YA(HB) W-Silk USB KB-LVT8 25209162 1
Sunrex EKB-10YA(FR) W-Silk USB KB-LVT8 25209163 1
Sunrex EKB-10YA(GK) W-Silk USB KB-LVT8 25209164 1
Sunrex EKB-10YA(HG) W-Silk USB KB-LVT8 25209165 1
Sunrex EKB-10YA(BG) W-Silk USB KB-LVT8 25209166 1
Sunrex EKB-10YA(HR) W-Silk USB KB-LVT8 25209167 1
Sunrex EKB-10YA(JP) W-Silk USB KB-LVT8 25209168 1
Sunrex EKB-10YA(EN-FR) W-S USB KB-LVT8 25209169 1
Sunrex EKB-10YA(PT) W-Silk USB KB-LVT8 25209170 1
Sunrex EKB-10YA(BE-EN) W-S USB KB-LVT8 25209171 1
Sunrex EKB-10YA(DU) W-S USB KB-LVT8 25209172 1
Mouse Mouse Liteon LXH-SM-8825 B-Silk Mouse 25200528 1
Chicony LXH-MSU-1111 B-Silk Mouse 25200529 1
Sunrex LXH-EMS-10ZA B-Silk Mouse 25200530 1
Liteon LXH-SM-8825 W-Silk Mouse 25201068 1
Sunrex LXH-EMS-10ZA W-Silk Mouse 25201322 1
Primax M300 USB gesture mouse BLK 25213876 1
Liteon M300 USB gesture mouse BLK 25213877 1
Primax M300 USB gesture mouse WHT 25213977 1
Power Cord Power Cord longwell Black Single-end 1.0m3wire ULCSA Power Cable 31033857 1
Volex 1m C5 US Power Cable 31033858 1
Luxshare1.0m C5 US Power Cable 31049517 1
longwell Black Single-end 1.0m SAA Power Cable 31035397 1
Volex 1m C5 Australia Power Cable 31049500 1
Luxshare1.0m C5 Australia Power Cable 31049520 1
Luxshare 1.0M C5 2pin Japan power cord 31503425 1
Longwell 1.0M C5 2pin Japan power cord 31503423 1
Volex1.0M C5 2pin Japan power cord 31503424 1
Grandsun Black Single-end 1.0m3wire CCC Power Cable (R) 31032953 1
Luxshare1.0M C5 CCC Power Cable 31045147 1
longwell Black Single-end 1.0m ASTA Power Cable 31035396 1
Volex 1m C5 UK Power Cable 31049496 1
Luxshare1.0m C5 UK Power Cable 31503352 1
longwell Black Single-end 1.0m VDE Power Cable 31035332 1

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 Volex 1m C5 Europe Power Cable 31049497 1
Luxshare1.0m C5 Europe Power Cable 31049518 1
longwell Black Single-end 1.0m India Power Cable 31035395 1
Luxshare1.0m C5 India Power Cable 31503353 1
Longwell Black Single-end 1.0m Italy C5 Power Cable ® 31039104 1
Volex 1m C5 Italy Power Cable 31049504 1
Luxshare1.0m C5 Italy Power Cable 31503359 1
Longwell Black Single-end 1.0m Brazil Power Cable ® 31035828 1
Volex 1m C5 Brazil Power Cable 31049505 1
Luxshare1.0m C5 Brazil Power Cable 31503357 1
Longwell Black Single-end 1.0m Argentina C5 Power Cable ® 31039100 1
Volex 1m C5 LA US Power Cable 31049507 1
Luxshare1.0m C5 LA US Power Cable 31503356 1
Longwell Black Single-end 1.0m Denmark C5 Power Cable ® 31039101 1
Volex 1m C5Denmarl Power Cable 31049503 1
Luxshare1.0m C5 Denmarl Power Cable 31503360 1
Longwell Black Single-end 1.0m Switzerland C5 Power Cable 31039103 1
®
Volex 1m C5Switzerland Power Cable 31049508 1
Luxshare1.0m C5 Switzerland Power Cable 31503361 1
Longwell Black Single-end 1.0m Israel C5 Power Cable ® 31039107 1
Volex 1m C5 Israel Power Cable 31049502 1
Luxshare1.0m C5 Isereal Power Cable 31503362 1
Longwell Black Single-end 1.0m Taiwan C5 Power Cable ® 31038885 1
Volex 1m C5 Taiwan Power Cable 31049499 1
Luxshare1.0m C5 Taiwan Power Cable 31503354 1
Longwell Black Single-end 1.0m Korea C5 Power Cable ® 31039106 1
Volex 1m C5 Korea Power Cable 31049498 1
Luxshare1.0m C5 Korea Power Cable 31503358 1
Longwell Black Single-end 1.0m SA C5 Power Cable ® 31039105 1
Volex 1m C5 SA Power Cable 31049501 1
Luxshare1.0m C5 SA Power Cable 31503355 1

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 Chapter 11. Additional Service Information
This chapter provides additional information that the service representative might find helpful.

Power management

Power management reduces the power consumption of certain components of the computer such as the
system power supply, processor, hard disk drives, and some monitors.

Advanced configuration and power interface (ACPI) BIOS

As this computer has an ACPI BIOS system, the operating system is allowed to control the power
management features of the computer and the settings for Advanced Power Management (APM) BIOS mode
is ignored. Not all operating systems support ACPI BIOS mode.

Automatic Power-On features

The Automatic Power-On features within the Power Management menu allow you to enable and disable
features that turn on the computer automatically.
• Wake Up on Alarm: You can specify a date and time at which the computer will be turned on automatically.
This can be either a single event , a daily event or a weekly event.
• Wake Up on LAN: This feature allows LAN adapter card to wake the System.

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