Intel Motherboard "events power odd" Questions

PC w Intel D945GNT shut down suddenly, will not restart Going along fine, no prior clues of a problem, then suddenly a few clicking relays and screen goes blank, drive lights go out, no bluescreen ...

...odd problem, my recommendation is just to check the basics. Test the power supply. Make sure the memory is well seated. Run memtest 86 and prime 95. And if you have more than 3gb or ram take some out ...

...odd problem. So the basics first, I have a pc I built from scratch that I originally had Server 2003 installed on. Stats: 300 Watt power supply Three Hard Drives IDE Legacy:6gb-os drive SATA: ...