Chapter 4 79

Index of Symptom-to-FRU Error Message

LCD-Related Symptoms

Indicator-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