74 Chapter 4

Index of Symptom-to-FRU Error Message

LCD-Related Symptoms

Symptom / Error Action in Sequence
LCD backlight doesn't w ork
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 func tion 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

Indicator-Related Symptoms

Symptom / Error Action in Sequence
Indicator incorrectly remains of f or o n, but sy stem
runs correctly Reconnect the inverter board
Inverter board
System board

Power-Related Symptoms

Symptom / Error Action in Sequence
Power shuts down dur ing operation Power source (battery pack and power adapt er). See “Power
System Check” on page 67.
Battery pack
Power adapter
Hard drive & battery connecti on boa r d
System board
The system doesn’t pow er-on. Power source (battery pack and power adapte r). See “Power
System Check” on page 67.
Battery pack
Power adapter
Hard drive & battery connecti on boa r d
System board
The system doesn’t pow er-off. Power source (battery pack and power adap ter). See “Power
System Check” on page 67.
Hold and press the power switch for more than 4 seconds.
System board
Battery can’t be charged See “Check the Battery Pack” on page 69 .
Battery pack
System board