Motherboard LED on, System won't boot

I currently have a a7n8x, barton 2500xp, 1gig of ddr400, ati9600pro. Anyways to the story, I was sitting on my computer browsing away and my computer rebooted itself randomly, no bluescreen or anything. I figured my processor might of overheated so I checked the bios and it was running at 114degrees farenheit. While I was watching the tempature idle for a minute my computer just froze. So I tried to manually turn it off and it wouldn't power down and the restart button wouldn't work. So my first thought was that one of the connections to the RESET SWITCH or POWER SWITCH came loose, this was not the case. Currently I have browsed the forums and looked at the same problem I have had as other people and a new PSU that I had in my other computer doesn't fix it. I have tried disconnecting all of the PSU stuff except to the computer but it still won't boot up (the mobo LED stays lit). I would appreciate it very much if someone could help me instead of buying a new a7n8x and trying it or a new processor. Thanks for your time, you can contact me on aim at Devbo84 .

I have also tried reseating the video card, using another video card, reseating the ram, try different slots with the ram (one stick at a time).