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74 Chapter 4
Index of Symptom-to-FRU Error Message
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
System board
Unreadable LCD screen
Missing pels in characters
Abnormal screen
Wrong color displayed
Reconnect the LCD connectors.
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
Indicator-Related Symptoms
Symptom / Error Action in Sequence
Indicator incorrectly remains off or on, but system runs
correctly.
Reconnect the LED board
LED board
System board
Power-Related Symptoms
Symptom / Error Action in Sequence
Power shuts down during operation. Power source (battery pack and power adapter).
Power System Check.
Battery pack
Power adapter
Audio board
System board
The system doesn’t power-on. Power source (battery pack and power adapter).
Power System Check.
Battery pack
Power adapter
Audio board
System board
The system doesn’t power-off. Power source (battery pack and power adapter).
Power System Check.
Hold and press the power switch for more than 4
seconds.
System board