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Index of Symptom-to-FRU Error Message
LCD-Related Symptoms
Symptom / Error
LCD backlight doesn't work
LCD is too dark
LCD brightness cannot be adjusted
Unreadable LCD screen
Missing pels in characters
Abnormal screen
Wrong color displayed
LCD has extra horizontal or vertical lines displayed.
Action in Sequence
First, plug a monitor to CRT port. Next, enter BIOS utility to running
“Load Default Settings” then reboot the system.
Reconnect the LCD connectors.
Keyboard (if the brightness function key doesn't work).
LCD cable
LCD inverter
LCD
Main board
Enter BIOS Utility to execute “Load Setup Default Settings”, then reboot system.
Reconnect the LCD connectors.
Keyboard (if the brightness function key doesn't work).
LCD cable
LCD inverter
LCD
Main board
Reconnect the LCD cable
LCD cable
LCD
Main board
Indicator-Related Symptoms
Symptom / Error
Indicator incorrectly remains off or on, but system runs correctly
HDD/CD-ROM active indicators cannot work
Main board
HDD/CD-ROM drive
Device driver
Main board
Action in Sequence
Power-Related Symptoms
Symptom / Error
Power shuts down during operation
The system cannot power-on.
The system cannot power-off.
Action in Sequence
Power source (battery pack and power adapter). See “Power
Battery pack
AC adapter
See if the thermal module is overheat (Heat sink or fan).
Main board
Power source (battery pack and power adapter). See “Power
Battery pack
Power adapter
CPU
Main board
In Windows XP operating system, hold and press the power switch for more than 4 seconds. If the system can power off, then the main board is OK. Verify OS in the HDD.
Main board
Chapter 4 67
68
Power-Related Symptoms
Symptom / Error
Battery can’t be charged or discharged
System hang during POST
Action in Sequence
See “Check the Battery Pack” on page 60.
Battery pack
Main board
ODD/HDD/FDD/RAM module
Main board
PCMCIA-Related Symptoms
Symptom / Error
System cannot detect the PC Card (PCMCIA)
PCMCIA slot pin is damaged.
PC Card cannot be inserted or ejected
Action in Sequence
PCMCIA slot assembly
Main board
PCMCIA slot assembly
Check if the PCMCIA slot is blocked
Main board
Memory-Related Symptoms
Symptom / Error
Memory count (size) appears different from actual size.
System can power on, but you hear two long beeps: “B--, B--” and the LCD is blank.
Action in Sequence
Enter BIOS Setup Utility to execute “Load Default Settings” then reboot system.
RAM module
Main board
Check BIOS revision
Reinsert DIMM
DIMM
Main board
Speaker-Related Symptoms
Symptom / Error
In Windows, multimedia programs, no sound comes from the computer.
OS volume control
Audio driver
Speaker
Main board
Action in Sequence
Internal speakers make noise or emit no sound.
Speaker
Main board
Microphone cannot work Audio driver
Volume control in Windows XP
Main board
Power Management-Related Symptoms
Symptom / Error
The system will not enter hibernation mode
The system doesn’t enter standby mode after closing the lid of the portable computer.
Action in Sequence
Power option in Windows XP
Hard disk drive
Main board
Driver of Power Option Properties
Lid close switch in upper case
Main board
Chapter 4
Power Management-Related Symptoms
The system doesn't resume from hibernation/ standby mode.
Symptom / Error
The system doesn't resume from standby mode after opening the lid of the portable computer.
Battery fuel gauge in Windows doesn’t go higher than 90%.
System hangs intermittently.
Action in Sequence
Connect AC adapter then check if the system resumes from
Standby/Hibernation mode.
Check if the battery is low.
Hard disk drive
Main board
LCD cover switch
Main board
Refresh battery (continue use battery until power off, then charge battery).
Battery pack
Main board
Reconnect hard disk/CD-ROM drives.
Main board
Peripheral-Related Symptoms
Symptom / Error
System configuration does not match the installed devices.
External display does not work correctly.
USB does not work correctly
Print problems.
Parallel port device problems
Action in Sequence
Enter BIOS Setup Utility to execute “Load Setup defaults”, then reboot system.
Reconnect hard disk/CD-ROM drives/FDD or other peripherals.
Main board
Press Fn+F5, LCD/CRT/Both display switching
Keyboard
Main board
Main board
Enter BIOS Setup Utility to execute “Load Default Settings” then reboot the system.
Run printer self-test.
Printer driver
Printer cable
Printer
Main board
Enter BIOS Setup Utility to execute “Load Default Settings” then reboot the system.
Device driver
Device cable
Device
Main board
Keyboard/Touchpad-Related Symptoms
Symptom / Error
Keyboard (one or more keys) does not work.
Touchpad does not work.
Action in Sequence
Reconnect the keyboard cable.
Keyboard
Main board
Reconnect touchpad cable.
Touchpad board
Main board
Chapter 4 69
Modem/LAN-Related Symptoms
Symptom / Error
Internal modem does not work correctly.
Internal LAN does not work correctly
Action in Sequence
Phone cable
Driver
Reconnect the Internal modem cable to the main board tightly.
Main board
Lan cable
Driver
Main board
70 Chapter 4
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