AOpen OpenBook 1556 Service Manual page 101

Power Management-Related Symptoms
Symptom / Error
The system will not enter hibernation
The system doesn't enter hibernation mode and
four short beeps every minute.
The system doesn't enter standby mode after
closing the LCD
The system doesn't resume from hibernation
mode.
The system doesn't resume from standby mode
after opening the LCD.
Battery fuel gauge in Windows doesn't go higher
than 90%.
Peripheral-Related Symptoms
Symptom / Error
System configuration does not match the
installed devices.
External display does not work correctly.
USB does not work correctly
Print problems.
Serial or parallel port device problems.
Chapter 4
Action in Sequence
Keyboard (if control is from the keyboard)
Hard disk drive
Main Board
m
Press Fn+ and see if the computer enters hibernation mode.
Touchpad
Keyboard
Hard disk connection board
Hard disk drive
Main Board
LCD cover switch
Main Board
Hard disk connection board
Hard disk drive
Main Board
LCD cover switch
Main Board
Remove battery pack and let it cool for 2 hours.
Refresh battery (continue use battery until power off, then charge
battery).
Battery pack
Main Board
Action in Sequence
Enter BIOS Setup Utility to execute "Load Default Settings", then
reboot system.
Reconnect hard disk/CD-ROM/diskette drives.
n
Press Fn+ , LCD/CRT/Both display switching
Main Board
Main Board
Ensure the "Parallel Port" in the "Onboard Devices Configuration" of
BIOS Setup Utility is set to Enabled.
Onboard Devices Configuration
Run printer self-test.
Printer driver
Printer cable
Printer
Main Board
Ensure the "Serial Port" in the Devices Configuration" of BIOS Setup
Utility is set to Enabled.
Device driver
Device cable
Device
Main Board
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