SG_Aspire4920_Book.book
Page 108
Monday, May 28, 2007 6:49 PM
Index of Symptom-to-FRU Error Message LCD-Related Symptoms Symptom / Error LCD backlight doesn't work LCD is too dark LCD brightness cannot be adjusted LCD contrast cannot be adjusted
Check or do the following in sequence T T T T T T T T
Unreadable LCD screen Missing pels in characters Abnormal screen Wrong color displayed
T T T T T T
LCD has extra horizontal or vertical lines displayed.
T T T T T
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 board LCD Mainboard Reconnect the LCD connector LCD inverter ID LCD cable LCD inverter board LCD Mainboard LCD inverter ID LCD inverter board LCD cable LCD Mainboard
Indicator-Related Symptoms Symptom / Error Indicator incorrectly remains off or on, but system runs correctly
Check or do the following in sequence T T
Reconnect the inverter board. Mainboard
Power-Related Symptoms Symptom / Error Power shuts down during operation
Check or do the following in sequence T T T T T
The system doesn’t power-on.
T T T T T
108
Power source (battery pack and power adapter). See “Power System Check” on page 99. Battery pack Power adapter Hard disk drive & battery connection board Mainboard Power source (battery pack and power adapter). See “Power System Check” on page 99. Battery pack Power adapter Hard disk drive & battery connection board Mainboard
Chapter 4
