124 Chapter 4Power On IssueIf the system doesn’t power on, perform the following actions one at a time to correct the problem. Do notreplace a non-defective FRUs:Computer Shutsdown IntermittentlyIf 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 directlyinto a known good electrical outlet.4. Disconnect the power and open the casing to check the Thermal Unit (see “Thermal Unit Failure” on page138) and fan airways are free of obstructions.5. Disable the power management settings in the BIOS to ensure they are not the cause of the problem (see“Boot” on page 36).6. Remove all external and non-essential hardware connected to the computer that are not necessary toboot the computer to the failure point.7. Remove any recently installed software.8. If the Issue is still not resolved, see “Online Support Information” on page 173.
