I have a PC with a Pentium Dual Core E5700 processor, 2 GB RAM in a ATX cabinet.
I have been facing a problem for the past few weeks. The CPU switches off without warning. This happens sometimes in a few minutes after switching on, sometimes after several hours. The screen goes blank, but the Power LED continues to glow. The restart button on the CPU also becomes unresponsive. I have to do a hard reboot by pressing the power on button for several seconds, or wait for few minutes after which the CPU reboots on its own.
I suspected a problem with the SMPS and changed it. The problem persisted. I then did a fresh install of the OS - Win 7 Pro. But the problem continues. Though the room tha houses my PC has no Aircon, the temperature is a reasonable 30 Deg C, which should not cause overheating. In any case, I have an additional CPU fan, as I am in a hot country.
Since the win resintall has not solved my issue, I guess it is a hardware problem. I have double checked all cables and slots too.
