98 Chapter 4
Index of Symptom-to-FRU Error Message
LCD-Related Symptoms
Symptom / Error Check or do the following in sequence
LCD backlight doesn't work
LCD is too dark
LCD brightness cannot be adjusted
LCD contrast cannot be adjusted
• Run “Load Setup Defaults” in BIOS Setup Utility, 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
• Mainboard
Unreadable LCD screen
Missing pels in characters
Abnormal screen
Wrong color displayed
• Reconnect the LCD connector
• LCD inverter ID
• LCD cable
• LCD inverter
• LCD
• Mainboard
LCD has extra horizontal or vertical lines
displayed.
• LCD inverter ID
• LCD inverter
• LCD cable
• LCD
• Mainboard
Indicator-Related Symptoms
Symptom / Error Check or do the following in sequence
Indicator incorrectly remains off or on, but
system runs correctly
• Reconnect the inverter board.
• Mainboard
Power-Related Symptoms
Symptom / Error Check or do the following in sequence
Power shuts down during operation
• Power source (battery pack and power adapter). See “Power
System Check” on page 89.
• Battery pack
• Power adapter
• Hard disk drive & battery connection board
• Mainboard
The system doesn’t power-on.
• Power source (battery pack and power adapter). See “Power
System Check” on page 89.
• Battery pack
• Power adapter
• Hard disk drive & battery connection board
• Mainboard
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