Power On Issue - Packard Bell EasyNote LJ75 Service Manual

Power On Issue

If the system doesn't power on, perform the following actions one at a time to correct the problem. Do not
replace non-defective FRUs:
Computer Shuts down Intermittently
If the system powers off at intervals, perform the following actions one at a time to correct the problem.
1. Check the power cable is properly connected to the computer and the electrical outlet.
2. Remove any extension cables between the computer and the outlet.
3. Remove any surge protectors between the computer and the electrical outlet. Plug the computer directly
into a known good electrical outlet.
4. Disconnect the power and open the casing to check the Thermal Unit (see "Thermal Unit Failure" on page
157) and fan airways are free of obstructions.
5. Remove all external and non-essential hardware connected to the computer that are not necessary to
boot the computer to the failure point.
6. Remove any recently installed software.
7. If the Issue is still not resolved, see "Online Support Information" on page 207.
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Start Start
Check
Check
AC/Batt only
AC/Batt only
power on
power on
OK OK
Check
Check
Power/B
Power/B
Whether OK
Whether OK
Swap M/B Swap M/B
OK OK
Swap Swap
AC/Battery AC/Battery
NG NG
OK OK
Swap Power Swap Power
NG NG
SW/B SW/B
Chapter 4