Chapter 6 Troubleshooting Guidelines
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Chapter 6 Troubleshooting Guidelines
Trouble Shooting List
6.1 No display
6.2 LCD no display / Invalid picture
6.3 External monitor has no display or color incorrect
6.4 Memory test error
6.5 Keyboard test error
6.6 Touch pad test error
6.7 Memory Card bus Failure
6.8 Hard disk drive test error
6.9 CMOS test error
6.10 Audio failure
6.11 No power symptom
6.12 No boot symptom
6.13 Bluetooth test error
6.14 Stopping in LCD screen while booting
6.15 Wireless Lan failure
6.16 LAN Failure
6.17 Battery Failure
6.18 USB Port Failure
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Chapter 6 Troubleshooting Guidelines
6.1 No display (system failure)
Symptom: There is no display on both LCD and Monitor after power on although
the LCD and Monitor are known-good.
No Display
NO
Monitor or LCD module ok? Replace monitor or LCD
Yes
NO
DDR RAM module ok? Replace DDR module
Yes
NO
Yes
Display Ok? Correct it
No
Replace motherboard
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No
Chapter 6 Troubleshooting Guidelines
6.2 LCD no display or Invalid Picture
Symptom: The LCD shows nothing or abnormal picture, but it is ok for external
monitor.
LCD No Display
Try another known good LCD module
Yes Replace each part of LCD
Display module / cables and test
OK?
No
Replace motherboard
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Chapter 6 Troubleshooting Guidelines
6.3 External monitor has no display or color abnormal
Symptom: The CRT monitor shows nothing or abnormal color, but it is ok for
LCD
Monitor No Display
Try another known good monitor
Yes
Display Ok?
Replace faulty monitor
No
Setup Ok? No
Correct it
Yes
Replace motherboard
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Chapter 6 Troubleshooting Guidelines
6.4 Memory test error
Memory test error
Try another known good DRAM module
Yes
Replace the faulty
Test OK?
DRAM module
No
Replace motherboard
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Chapter 6 Troubleshooting Guidelines
6.5 Keyboard test error
Symptom: error message of keyboard failure is shown or any key doesn’t work
Keyboard test error
No
Is K/B cable connected to
M/B properly? Connect or Replace
K/B cable
Yes
Try another good keyboard
Yes
Test Ok? Replace the faulty keyboard
No
Replace motherboard
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Chapter 6 Troubleshooting Guidelines
6.6 Touch Pad test error
Symptom: An error message is shown when the Touch Pad point is enabled
Touch pad error
1. Check Touch pad device in Windows if it is properly
Installed (including driver)
2. Check cable connected properly
Try another known good touch pad module and cable
Yes
Test Ok? Replace the faulty parts
No
Replace motherboard
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Chapter 6 Troubleshooting Guidelines
6.7 Memory Card Bus failure
Symptom: When insert Memory Stick can’t detect Device with removable
storage.
Memory Card Bus failure
1. Check Memory Card Bus Device in Windows if it is properly installed
(including driver)
2.Try to reinsert Memory Stick
Yes
Test Ok? Correct it
No
Replace Motherboard
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Chapter 6 Troubleshooting Guidelines
6.8 Hard disk drive test error
Symptom: Either an error message is shown, or the drive motor spins non-stop,
while reading data from or writing data to Hard disk
Hard disk test error
Yes
Check BIOS
Correct it
Setup OK?
No
Try another known good HDD
Yes Replace the faulty parts
Re-boot ok?
No
Replace motherboard
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Chapter 6 Troubleshooting Guidelines
6.9 CMOS test error
CMOS data lost, or inaccurate system time & data
CMOS test error
1. Plug in AC adapter, power on the system and set correct data in BIOS setup
2. Replace CMOS Battery
3. Turn off power for 1 hour then turn on again
Yes
Re-boot OK?
END
No
Replace motherboard
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Chapter 6 Troubleshooting Guidelines
6.10 Audio failure
Symptom: No sound from speaker after audio drive is installed.
Audio test error
1. check whether cables, speakers & audio drivers are installed properly
2. try another working speaker & cable
Yes
Re-test ok? Correct it
No
No
Setup ok? Correct it
Yes
Replace motherboard
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Chapter 6 Troubleshooting Guidelines
6.11 No power symptom:
Symptom: When the power button is pressed, nothing happens, power indicator
is not light up.
No Power
Check Adapter is good
Yes
Replace Bios Correct it
ok?
No
Replace motherboard
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Chapter 6 Troubleshooting Guidelines
6.12 No boot symptom:
No boot
Check power system is OK
Check I/O device is corrected
Yes
Reboot & display Correct it
is OK?
No
Replace the motherboard
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Chapter 6 Troubleshooting Guidelines
6.13 Bluetooth test error
An error message is shown when the bluetooth is enbled
Bluetooth can not detect
1. Check bluetooth device in windows if Yes
it is properly
installed(including driver) Correct it
2. Check cable connected properly
No
Try another known good bluetooth
Yes Replace the faulty parts
Re-boot ok?
No
Replace motherboard
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Chapter 6 Troubleshooting Guidelines
6.14 Stopping in LCD screen while booting
Stop in LCD Screen while
booting
1.Try another known good CD-ROM
2. Try another known good HDD
Yes
3. Try another known good CPU
4.. Thermal module deformation
Yes
ReplaceNo
Bios ok?
Correct it
No
Replace Motherboard
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Chapter 6 Troubleshooting Guidelines
6.15 Wireless LAN failure
W/LAN Failure
Check Driver install is No
Correct it
OK?
Yes
Yes
Replace another
known good Modem Correct it
Card
No
Replace Motherboard
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Chapter 6 Troubleshooting Guidelines
6.16 LAN failure
Symptom: When cannot detect Network Adapter device and can’t enter internet.
LAN failure
1. Check Network Adapter Device in Windows if it is properly
Installed (including driver)
2. Setup Network Connections in Windows
3. Reinsert LAN cable.
Yes
Correct it
Re-test Ok?
No
Replace Motherboard
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Chapter 6 Troubleshooting Guidelines
6.17 Battery Failure
Battery Failure
Try another known Yes
good Battery Correct it
No
Replace Motherboard
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Chapter 6 Troubleshooting Guidelines
6.18 USB Port Failure
USB Port Failure
Try another known Yes
good USB Device Correct it
No
No
Replace Motherboard
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