I have a Dell Dimension E521 that reboots on its own. I've tested, replaced and/or removed the RAM, Optical Drives, All add-on cards & PSU. Additionally I've reloaded the OS ( Media Ctr 2005).
After all of this the PC continues to reboot and/or shut down on its own. Sometimes during its process of rebooting it will shut down completely after trying to reboot a few times. There are no visible signs of leaking caps on the mobo/any other cards. I'm down to CPU, MOBO and I/O Front Panel card. Before I begin buying replacement parts I'd like to get some advice.
The problem occurs regardless of what is being done with the computer. From idle to busy the out come is the same.