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84 Chapter 4
Index of Symptom-to-FRU Error Message
Error Message List
No beep Error Messages FRU/Action in Sequence
No beep, power-on indicator turns off and LCD
is blank.
Power source (battery pack and power adapter). See “Power
System Check” on page 79.
Ensure every connector is connected tightly and correctly.
Reconnect the DIMM.
LED board.
Main Board.
No beep, power-on indicator turns on and LCD
is blank.
Power source (battery pack and power adapter). See “Power
System Check” on page 79.
Reconnect the LCD connector
Hard disk drive
LCD inverter ID
LCD cable
LCD Inverter
LCD
Main Board
No beep, power-on indicator turns on and LCD
is blank. But you can see POST on an
external CRT.
Reconnect the LCD connectors.
LCD inverter ID
LCD cable
LCD inverter
LCD
Main Board
No beep, power-on indicator turns on and a
blinking cursor shown on LCD during POST.
Ensure every connector is connected tightly and correctly.
Main Board
No beep during POST but system runs
correctly.
Speaker
Main Board
LCD-Related Symptoms
Symptom / Error Action in Sequence
LCD backlight doesn't work
LCD is too dark
LCD brightness cannot be adjusted
LCD contrast cannot be adjusted
Enter BIOS Utility to execute “Load Setup Default Settings”, then
reboot system.
Reconnect the LCD connectors.
Keyboard (if contrast and brightness function key doesn't work).
LCD inverter ID
LCD cable
LCD inverter
LCD
Main Board
Unreadable LCD screen
Missing pels in characters
Abnormal screen
Wrong color displayed
Reconnect the LCD connector
LCD inverter ID
LCD cable
LCD inverter
LCD
Main Board
LCD has extra horizontal or vertical lines
displayed.
LCD inverter ID
LCD inverter
LCD cable
LCD
Main Board