Acer Aspire 4315, Service Manual

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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
T
Run “Load Setup Defaults” in BIOS Setup Utility, then reboot
system.
T
Reconnect the LCD connectors.
T
Keyboard (if contrast and brightness function key doesn't
work).
T
LCD inverter ID
T
LCD cable
T
LCD inverter board
T
LCD
T
Mainboard
Unreadable LCD screen
Missing pels in characters
Abnormal screen
Wrong color displayed
T
Reconnect the LCD connector
T
LCD inverter ID
T
LCD cable
T
LCD inverter board
T
LCD
T
Mainboard
LCD has extra horizontal or vertical lines
displayed.
T
LCD inverter ID
T
LCD inverter board
T
LCD cable
T
LCD
T
Mainboard
Indicator-Related Symptoms
Symptom / Error Check or do the following in sequence
Indicator incorrectly remains off or on, but
system runs correctly
T
Reconnect the LCD inverter board.
T
Mainboard
Power-Related Symptoms
Symptom / Error Check or do the following in sequence
Power shuts down during operation
T
Power source (battery pack and power adapter). See “Power
System Check” on page 89.
T
Battery pack
T
Power adapter
T
Hard disk drive & battery connection board
T
Mainboard
The system doesn’t power-on.
T
Power source (battery pack and power adapter). See “Power
System Check” on page 89.
T
Battery pack
T
Power adapter
T
Hard disk drive & battery connection board
T
Mainboard