Acer Aspire X3400G Acer Aspire X3400, X3400G Desktop Service Guide - Page 60

System Check Procedures Power System Check If the system will power on, skip this section. Refer to System External Inspection. If the system will not power on, do the following:  Check if the power cable is properly connected to the system and AC source.  Check if the voltage selector switch is set to the correct voltage setting. System External Inspection 1. Inspect the LED indicators on the front panel, which can indicate the malfunction. For the LED locations and description of their behaviour, see "System LED Indicators" on page 9. 2. Make sure that air flow is not blocked. 3. Make sure nothing in the system is making contact that could short out power. 4. If the problem is not evident, continue with System Internal Inspection. System Internal Inspection 1. Turn off the system and all the peripherals connected to it. 2. Unplug the power cord from the power outlets. 3. Unplug the power cord from the system. 4. Unplug all peripheral cables from the system. 5. Place the system unit on a flat, stable surface. 6. Remove the system covers. For instructions on removing system covers, refer to "System Disassembly" on page 27. 7. Verify that components are properly seated. 8. Verify that all cable connectors inside the system are firmly and correctly attached to their appropriate connectors. 9. Verify that all components are Acer-qualified and supported. 10. Replace the system covers. 11. Power on the system. 12. If the problem with the system is not evident, you can try viewing the POST messages and BIOS event logs during the system startup. 52 Chapter 4