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Chapter 4 77
Speaker-Related Symptoms
Symptom / Error Action in Sequence
No sound comes from the system when
running Windows multimedia programs.
Reinstall the audio driver.
Test or replace the speakers.
Test or replace the mainboard.
Internal speakers make noise or emit no
sound.
Test or replace the speakers.
Test or replace the mainboard.
Power Management-Related Symptoms
Symptom / Error Action in Sequence
System will not enter hibernation.
Test or replace the keyboard (if control is from the
keyboard).
Test or replace the hard disk drive.
Test or replace the mainboard.
System doesn't enter hibernation mode and
four short beeps every minute.
Press <Fn> + <O> and see if the system enters
hibernation mode.
Test or replace the touchpad
Test or replace the keyboard
Check the hard disk connection to the mainboard.
Test or replace the hard disk drive.
Test or replace the mainboard.
System doesn’t enter standby mode after
closing the LCD.
Test or replace the mainboard.
System doesn't resume from hibernation
mode.
Check the hard disk connection to the mainboard.
Test or replace the hard disk drive.
Test or replace the mainboard.
System doesn't resume from standby mode
after opening the LCD.
Test or replace the mainboard.
Battery fuel gauge in Windows doesn’t go
higher than 90%.
Remove battery pack and let it cool for 2 hours.
Refresh battery (use only battery until the notebook turns
off, then charge the battery).
Test or replace the battery pack.
Test or replace the mainboard.
System hangs intermittently.
Reconnect the hard disk drive and external optical drive.
Check the hard disk connection to the mainboard.
Test or replace the mainboard.
Peripheral Devices-Related Symptoms
Symptom / Error Action in Sequence
System configuration does not match the
installed devices.
Run “Load Setup Defaults” using the BIOS Setup Utility,
then reboot the system.
Reconnect the hard disk drive and external optical drive.
External display does not work correctly.
Press <Fn> + <F5> repeatedly to switch between LCD,
external display, and both displays.
Test or replace the mainboard.
USB does not work correctly
Test or replace the USB board.
Test or replace the mainboard.