Acer Power Sx, Service Manual

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76 Chapter 4
Undetermined Problems
If an error message is present, go to “POST Error Messages List” on page 68 . If you did not receive any
messages, see if the symptom is listed in “or “Error Symptoms List” on page 70. If you still cannot solve the
problem, continue with this check:
1. Check the power supply voltages. If the voltages are correct continue with the following steps:
2.
Power off the system unit.
3.
Perform the following checks, one by one, until you have isolated the
problem FRU.
4. Load default settings in setup.
5. Check all system board jumper positions and switch settings.
6.
Check all adapter card jumper positions.
7. Check all device jumper positions.
8. Check all cables and connectors for proper installation.
9. If the jumpers, switches and voltage settings are correct, remove or disconnect the following, one at a
time:
10. Non-Acer devices
!
External devices
!
Any adapter card (modem card, LAN card or video card, if installed)
!
CD/DVD-ROM drive
!
Diskette drive
!
Hard disk drive
!
DIMM
!
Processor
!
System board
11.
Power on the system unit.
12.
Repeat steps 2 through 5 until you find the failing device or adapter.