[lsatblu]

Hi,

I have a custom build PC that has ran fine for about a year. Lately it has been getting really hot, well the graphic cards do. My friend said I needed a new power supply. I was silly and didn't listen. My PC now does not start up. I turn it on and it shuts off. I went out and got a new power supply, BFG 650 Watt. I put everything back into place as best as I could.

I plugged the PC in and turned it on. It turned on and then shut off. Apparently the PC does fully turn on when I do not have the ATX12V plug plugged in. When I turn the PC on without that plugged it, the PC turns on and runs, but I can not see anything on my monitor.

I tried putting my old Power supply back and I have the same problem. It turns on fine when the ATX12V plug is not plugged in. As soon as I put it in, the PC shuts off.

Without the plug in, my monitor does not show anything and with the plug in, I don't get far enough to see if the monitor is working or not.

Any ideas?

[Krlll]

Not really other than the motherboard is fried.
Edit:Some more info on your system specs might be useful.

[slipend]

Are you sure you have the monitor plugged in correctly or that your monitor is not faulty. Try a different monitor.

[cyberspacegenie]

Have you checked your cpu cooler fan? A friend of mine recently had similar computer symptoms and it was because the fan on the cooler had come off so the cpu wasnt getting cool and hence shut itself down so as not to overheat.