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Republic of the Philippines

Department of Education
REGION V-BI COL
SCHOOLS DI VI SI ON OF CAM ARI NES SUR
DON SERVI LLANO PLATON M EM ORI AL NATI ONAL HIGH SCHOOL

COMPUTER
SYSTEMS SERVICING
NC II
(Quarter 1- Week 5)
 UNIT 2: INSTALLING AND CONFIGURING COMPUTER SYSTEMS
(Performing Computer Hardware Services)

Preliminary Activity: Skills Test

Direction: Listed below are some of the most important skills that you must gain in order for you to render quality
service when you enter the real world of Computer Hardware Servicing. Read carefully the skills then put a check
mark in Not much if you are not really familiar, A little if you have a little knowledge and A lot if you are familiar with
the skill. Feel free to answer each skill.

Skills in Computer Hardware Servicing Not Much A little A lot

I can open a computer case.
I can connect the mouse.
I can connect the keyboard.
I can connect the monitor.
I can detach the power supply from the system unit.
I know how to remove the RAM from the motherboard.
I can remove the hard drive from the system unit.
LESSON 7. Disassembling a Computer

At the end of the lesson, you should be able to:

A. Familiarize the parts of a system unit;
B. Disassemble a computer system; and
C. Document specifications and information on hardware;

You might be wondering why the lesson starts with disassembly and not assembly
itself? Simply because we want to learn how to disassemble so we can assemble it again from
how we took out the parts.

It is because in the industry, you will be performing disassembly especially in servicing, compared to building
a new computer and repairing and maintaining the computers in the workplace. You will have to be familiar
especially first with the system unit. We want you to learn how to assemble what you've taken out
(disassembled).

o Preparing for Disassembly

Before going into the disassembly proper, you will have to prepare all the materials that you will need.
Personal Computer Disassembly
Before starting computer disassembly, make sure you have the tools you need and they're all close by
and handy and be sure to have a container to keep the screws in so you have them when you want to put things
back together.

Step1. Unplugging - The first thing you do is to unplug every cable that is plugged in to your computer. That
includes the cables such as Power, USB, Mouse, Keyboard, Internet, Ethernet, Modem, AM\FM Antenna, Cable
TV, etc. Just unplug all the cables for safety purposes.
Now that your computer is fully unplugged, move your PC to a clean work space, preferably a carpet. The carpet
is better than tile, because screws and other small parts will roll around.

Step2. Opening the Outer Shell/Case- First, unscrew the four screws at the back of the computer. On most
computer cases, there will be large knobs that you can unscrew by hand or by screw driver on the back-right side
of the computer. The left side has small screws because on that side you can't access much on the inside.

Figure 1. Screw at the back of computer chasis

Once the screws are removed, you can remove the side panels. On most computers, they just slide off. Start with
the left side panel (the side that once had the knobs), slide it towards the back of the computer. Now you can
remove the left panel. Just like the other side, slide it towards the back of the computer.

Figure 2. Removing the side panel

NOTICE: If you are working on a carpet, about every five minutes touch something that is grounded (Sink faucet /
pipe, wire coming from the ground part of a wall outlet). This is done so you do not shock your motherboard or
other parts.
Step3. Removing the System Fan - First, unplug the fan from the motherboard. You can find the plug by following
the wire from the fan. It should be labeled "SYS_FAN1". Next, you will have to unscrew the fan from the outside.
You should now be able to lift the fan out of the PC.

Figure 3. Removing the system fan

Step4. Removing the CPU Fan- The CPU fan is located right on top of the CPU heat sink, which is a large
piece of metal with fins on the top. The CPU fan plugs into the motherboard in an awkward place, that is hard to
access. But just follow the wires and you should easily find it. It is labeled "CPU FAN1". To remove the fan from
the heat sink, remove the four screws securing it in place.

Figure 4. Removing the CPU fan

Step5. Power Supply - The first thing to do is unplug every wire coming from the power supply. You must
disconnect the motherboard (very large connector/plug), CD/DVD drive(s) power, internal hard drive power and
portable hard drive slot power.
Once everything is unplugged, unscrew the four screws holding the power supply in place, on the back of the
computer. Next, push the power supply from the outside, and then lift it out.

Figure 5. Unscrew the power supply

Step6. CD/ DVD Drive(s)- First, unplug the ribbon from the back of the drive. Once that is completed, pull on the
tab securing the drive in place, then push it out from the inside.

Figure 6. Location of CD / DVD Drive

Step7. Hard Drive - First, unplug the connector at the back of the slot, and unplug the other end from the
motherboard. Also unplug the SATA cable from the motherboard and the hard drive. The portable hard drive slot
is secured the same way the CD/DVD drive is, with a tab. Pull on the tab, then slide the slot out.

Figure 7. Unplugging the Hard Drive connector

To remove the hard drive from the side of the slot, unscrew the four screws securing it in place. You must
be very careful not to drop the hard drive, since it is very delicate!

Removing the hard drive from the side of the slot

Step8. Memory (RAM) - To remove the RAM, push down on both tabs holding the RAM in place, which are
located at both ends of the RAM.

Figure 8. Removing the Memory

Step9. Motherboard - The motherboard has seven screws holding it to the frame, which are indicated by large
white circles around them. Remove them and then lift the motherboard out of the frame.

Step 9. Removing the Motherboard

Name:____________________________ Section:_________ Date:_____________

LESSON 7. Disassembling a Computer

Written Work #7

Task: Rearrange the Procedures

Direction: Rearrange the following procedures in their proper order. Use numbers to indicate their order of
precedence. The first number is done for you.

A. Personal Computer Disassembly

__7_1. Detaching the Hard Drive
____2. Detaching the power supply
____3. Opening the outer shell / case
____4. Pull Out the Motherboard
____5. Removing the CD / DVD Drives
____6. Removing the CPU fan
____7. Removing the system fan
____8. Unplugging all the cables and wires

II. What factors should be considered before disassembly of a computer?

______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
LESSON 8: ASSEMBLING A COMPUTER

At the end of the lesson, you should be able to:

A. Understand the proper procedure of assembling a computer
B. Assemble a computer system

Now that you've learned how to disassemble a PC, we are now going to proceed to assembling
what we just disassembled. Ideally, as seen in the last part of the disassembly video, you need to
document the specifications/status of the components before putting back the system unit together
again.

A helpful tip is since you worked your way part by part in disassembly, now you are just going to retrace
your steps in assembling it.

o Preparing for Assembly

Before going into the assembly proper, you will have to prepare all the materials that you will need.
 Step by Step Computer Assembly

Step 1. Prepare your workplace

1.1. Take Inventory:
Before you start, take an inventory of your parts. Do not begin assembling your computer if you don't have
everything you need. Begin the step-by-step process once you are ready with everything you need.

Figure 1. Take inventory of the Different Computer Parts

1.2. Make Space, Make Time:

Building a PC takes up space - about a dining room table worth. So make sure you have plenty of working room
and a few hours to proceed with minimal interruption. Work on a flat, stable table top surface, or bare floor, where
you have room to layout all of the items.
1.3. Prepare Grounding Protection:
Use an inexpensive antistatic wrist strap. It is the perfect preventive measure if you have no alternative to working
on carpet. Remember, a table top or bare floor is always the best place to build your system. Make sure you are
wearing your antistatic wrist strap correctly (it does you no good at all if you do not wear it!), and you are ready to
proceed.

Step 2. Install the Power Supply

Power supply installation steps include the following: 1.Insert the power supply
into the case 2.Align the holes in the power supply with the holes in the case
3.Secure the power supply to the case using the proper screws

Step 3. Attach Components to the Motherboard CPU on Motherboard

•The CPU and motherboardare sensitive to electrostatic discharge.
•The CPU is secured to the socketon the motherboard with a lockingassembly.
•CAUTION:When handling a CPU, do not touch the CPU contacts. Thermalcompound
•It helps to keep the CPU cool.
•To install a used CPU, clean it and the base of the heat sink with isopropyl alcohol to
remove the old thermal compound. Heat Sink/Fan Assembly
•The Heat Sink/Fan Assemblyis a two-part cooling device.
•The heat sink draws heat away from the CPU. Install RAM
•RAMprovides temporary data storage for the CPU and should be installed in the
motherboard before the motherboard is placed in the computer case.
Step 4. The Motherboard
o After installing the previous components the motherboard is now ready
to install in the computer case.
o Plastic and metal standoffsare used to mount the motherboard and to
prevent it from touching the metal portions of the case.

Step 5.Install Internal Drives

o Drives that are installed in internal bays are called internal drives. A hard disk
drive (HDD) is an example of an internal drive. HDD installation steps:
1. Position the HDD so that it aligns with the 3.5-inch drive bay.
2. Insert the HDD into the drive bay so that the screw holes in the drive line up
with the screw holes in the case.
3. Secure the HDD to the case using the proper screws.

Step 6. Connect Internal Cables

Power cablesare used to distribute electricity from the power supply to the motherboard and other components.

Step 7. Complete Physical Installation

o Now that all the internal components and the power supply have been installed and connected to the
motherboard, the following tasks should be completed:
•Re-Attach the side panels: Most computer cases have two panels, one on each side. Some computer
cases have one three-sided cover that slides down over the case frame.
•Connect External Cables: These cables are normally connected to the back of the computer. Here are
some common external cable connections: Monitor, Keyboard, Mouse, USB, Ethernet Power.
Name:____________________________ Section:_________ Date:_____________

LESSON 8. Assembling a Computer

Written Work #8

Answer the following questions:

1. What is the essence of following the correct procedures in connecting the PC parts?

2. What do you think is the main reason why we should never exert too much force when attaching the
cables of PC parts? Explain your answer.
LESSON 9. Installing Output Devices

At the end of the lesson, you should be able to:

D. Identify the different I/O Devices
E. Install I/O Devices

If you still do not have an installed operating system, you can simply install
the keyboard and mouse first. Then, install an operating system. After
installing an operating system, install the rest of your peripherals.

These devices are important since it lets you control your computer.

Installing the Keyboard

1. Make sure to read the instruction manual of your keyboard first.

2. Check whether the keyboard has a USB (flat, rectangular shape) or PS/2 (typically
round and purple colored) connector.

3. Install the keyboard by connecting it to its proper port.

4. Do not install the keyboard while the computer is powered on. Do not remove the
keyboard while the computer is running.

Installing the Mouse

The process to installing this device is similar to that of the keyboard. Check whether your
mouse is using a PS/2 Connector or a USB connector then connect it to its proper port.

Installing the Monitor

1. Identify the connection type that will connect the monitor to the motherboard or the
graphics card.
2. A DVI, VGA, or HDMI are common ports in the monitor and used to produce best
picture qualities.
3. Once the display is plugged to its proper connector on the video card or the
motherboard, the display is ready. Most of the time, drivers are not required but it should be
downloaded to utilize a maximum resolution.

Installing the Speakers

1.Determine the type of speaker and its connector.
2.Connect the cable (usually a 3.5mm jack) to the line-out jack of the computer sound card
or on the system unit.
3.Plug in the power cord.

Installing the Printer

1.Make sure to have the printer and power cable.
2.Connect the printer connector to the unit.
3.Insert the ink or toner cartridge to the printer.
4.Turn the printer on.
5.Power the computer.
6.Start the Printer Install Wizard.
7.Follow the instructions to install the Printer Driver.
8. Run a test print to check if the printer is installed correctly.
Name:____________________________ Section:_________ Date:_____________

LESSON 9. I/O Devices

Written Work #9
Directions. Choose the correct cable from the word box associated with the input/output Devices

HDMI/VGA/DVI-D 5mm Jack

PS/2 USB

1. ____________________________

2. ____________________________

3. ____________________________

4. ____________________________

5. ____________________________
Name:____________________________ Section:_________ Date:_____________

PERFORMANCE TASK

ACTIVITY TITLE: PC Disassembly and Assembly

Performance Objective In the Computer Lab, given all the needed tools, materials
and a computer, the learner must be able to perform a 15 Minute PC Disassemble
and Assemble of a Computer.

Assessment Method: Practical and Interview

CRITERIA PERCENTAGE

Remove PC Components (Remove all components from the PC) 30

Identify Components (Identify all components from disassembled 40

PC)

Assembly of PC (Correctly Install all components into PC) 30

100%