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90 Troubleshooting
Power Management-Related Symptoms
Symptom / Error Action in Sequence
The system will not enter
hibernation.
Keyboard (if control is from the keyboard)
Hard disk drive
System board
Check with Sleep Manager.
The system doesn't enter
hibernation mode and four
short beeps every minute.
Hibernation Mode
Press Fn+F4 and see if the computer enters
hibernation mode.
Touchpad
Keyboard
Hard disk connection board
Hard disk drive
System board
The system doesn’t enter
standby mode after closing
the LCD.
Standby Mode
LCD cover switch
System board
The system doesn't resume
from hibernation mode.
Hybernation Mode
Hard disk connection board
Hard disk drive
System board
The system doesn't resume
from standby mode after
opening the LCD.
Standby Mode
LCD cover switch
System board
Battery fuel gauge in
Windows doesn’t go higher
than 90%.
Remove battery pack and let it cool for 2 hours.
Refresh battery (continue to use battery until
power off, then charge battery).
Battery pack
Charger board
System board
System hangs intermittently. Set Thermal Sensor Threshold.
Reconnect hard disk/CD-ROM drives.
Hard disk connection board
System board