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Chapter 4 71
Index of Symptom-to-FRU Error Message
LCD-Related Symptoms
Indicator-Related Symptoms
Power-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
System 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
System board
LCD has extra horizontal or vertical lines
displayed
LCD inverter ID
LCD inverter
LCD cable
LCD
System board
Symptom / Error Action in Sequence
Indicator incorrectly remains off or on, but
system runs correctly
Reconnect the inverter board.
Inverter board
System board
Symptom / Error Action in Sequence
Power shuts down during operation Power source (battery pack and power
adapter). See “Power System Check” on page
61.
Battery pack
Power adapter
Hard drive & battery connection board.
System board
The system doesn’t power-on. Power source (battery pack and power
adapter). See “Power System Check” on page
61.
Battery pack
Power adapter
Hard drive & battery connection board.
System board