Posted 06 May 2011 - 03:12 PM
First of all, does the computer get into the OS or does it crash before hand?
I want to know, but either way though, try these.
Try a known good power supply with all of the proper connections (12V CPU, 24 or 20 motherboard power, SATA/Molex for your hard drive), and that should cover it. Really all you need is a CPU plug and a mainboard plug to actually boot. But in order to get into your OS, you will need your hard drive plugged in.
Also, if you don't have a power supply in near reach, go down to absolute basics. One stick of RAM, CPU plug, motherboard plug, and your hard drive plug. If it still does it, unplug the drive and see if it stays running.