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88 Chapter 4
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 do not
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.
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.
Battery pack
Power adapter
Hard drive & battery connection board
System board
The system doesn’t power-off. Power source (battery pack and power adapter). See
Power System Check.
Hold and press the power switch for more than 4 seconds.
System board