Symptom-To-Fru Error Messages - Acer TravelMate 4740 Service Manual

Symptom-to-FRU Error Messages

LCD-Related Symptoms
LCD backlight doesn't work

LCD is too dark

LCD brightness cannot be adjusted

LCD contrast cannot be adjusted

Unreadable LCD screen

Missing pels in characters

Abnormal screen

Wrong color displayed

LCD has extra horizontal or vertical lines
displayed.
Power-Related Symptoms
System shuts down during operation
System doesn't power-on.
System doesn't turn off.
The battery can't be charged
Memory-Related Symptoms
Memory count (size) appears different from
actual size.
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Action in Sequence
Run "Load Setup Defaults" using the BIOS Setup Utility,

then reboot the system.
Reconnect the LCD connector.

Test or replace the keyboard (if contrast and brightness

function key doesn't work).
Test or replace the LCD cable.

Test or replace the LCD.

Test or replace the mainboard.

Reconnect the LCD connector.

Test or replace the LCD cable.

Test or replace the LCD.

Test or replace the mainboard.

Test or replace the LCD cable.

Test or replace the LCD.

Test or replace the mainboard.

Action in Sequence
Test the power source (battery pack and power adapter).

See "Power System Check" on page 67.
Test or replace the battery pack.

Test or replace the power adapter.

Test or replace the mainboard.

Test the power source (battery pack and power adapter).

See "Power System Check" on page 67.
Test or replace the battery pack.

Test or replace the power adapter.

Test or replace the mainboard.

Test the power source (battery pack and power adapter).

See "Power System Check" on page 67.
Press and hold the power button for more than 4 secs.

Test or replace the mainboard.

Test the battery pack. See "Check the Battery Pack" on

page 68.
Test or replace the battery pack.

Test or replace the mainboard.

Action in Sequence
Run "Load Setup Defaults" using the BIOS Setup Utility,

then reboot the system.
Test or replace the SO-DIMM.

Test or replace the mainboard.

Chapter 4