Acer Aspire 4540 Acer Aspire 4540 Series Service Guide - Page 148

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 a non-defective FRUs: Computer Shutsdown 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 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 211. 138 Chapter 4