Index of Symptom-to-FRU Error Message

LCD-Related Symptoms

Symptom / Error

Action in Sequence

 

 

LCD backlight doesn't work

First, plug a monitor to CRT port. Next, enter BIOS utility to running

 

“Load Default Settings” then reboot the system.

 

Reconnect the LCD connectors.

 

Keyboard (if the brightness function key doesn't work).

 

LCD cable

 

LCD inverter

 

LCD

 

Main board

 

 

LCD is too dark

Enter BIOS Utility to execute “Load Setup Default Settings”, then

LCD brightness cannot be adjusted

reboot system.

 

Reconnect the LCD connectors.

 

Keyboard (if the brightness function key doesn't work).

 

LCD cable

 

LCD inverter

 

LCD

 

Main board

 

 

Unreadable LCD screen

Reconnect the LCD cable

Missing pels in characters

LCD cable

Abnormal screen

LCD

Wrong color displayed

Main board

LCD has extra horizontal or vertical lines

 

displayed.

 

 

 

Indicator-Related Symptoms

Symptom / Error

Action in Sequence

 

 

Indicator incorrectly remains off or on, but system

Main board

runs correctly

 

 

 

HDD/CD-ROM active indicators cannot work

HDD/CD-ROM drive

 

Device driver

 

Main board

 

 

Power-Related Symptoms

Symptom / Error

Action in Sequence

 

 

Power shuts down during operation

Power source (battery pack and power adapter). See “Power

 

System Check” on page 95.

 

Battery pack

 

AC adapter

 

See if the thermal module is overheat (Heat sink or fan).

 

Main board

 

 

The system cannot power-on.

Power source (battery pack and power adapter). See “Power

 

System Check” on page 95.

 

Battery pack

 

Power adapter

 

CPU

 

Main board

 

 

The system cannot power-off.

In Windows XP operating system, hold and press the power switch

 

for more than 4 seconds. If the system can power off, then the main

 

board is OK. Verify OS in the HDD.

 

Main board

 

 

104

Chapter 4

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Acer 4270 Index of Symptom-to-FRU Error Message, LCD-Related Symptoms, Indicator-Related Symptoms, Power-Related Symptoms