85Undetermined ProblemsIf an error message is present, go to “POST Error Messages List” on page 64. If you did notreceive any messages, if the symptom is listed in “or “Error Symptoms List” on page 60. If you stillcannot solve the problem, continue with this check:1. Check the power supply voltages. If the voltages are correct continue with thefollowing 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 main 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 thefollowing, 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 Main board11. Power on the system unit.12. Repeat steps 2 through 5 until you find the failing device or adapter.
