[St_anne]

What would cause a PC to just completely shut down? There was no power failure, as the UPS would have kept it running. There was just 1 long beep then complete shut down. I had to hold the power button in turn off the green hard drive light. Then I turned off the power switch in the rear of the case, waited about 5 minutes, turned it back on, pushed the power-on button, and everything seems to be working okay.
Is this an indication of a failure in the works? This PC is 5 years old, I built it myself, and in the past month swapped out the main hard drive and reinstalled the OS, and just last week replaced the DVD-RW drive. The power supply came with the Antec case.

Thanks for any suggestions.

Anne

[ftmiller]

Check the fan that cools the power supply, I have had problems like that before, what happens is when the fan stops or slowes down the power supply gets to hot and shuts down because of thermal overload.