I left my pc with a game running for a hour and when I went back to it it the pc had switched itself off. I managed after pressing the on button a couple of times to start it up again only for it to turn off again and now it wont come on at all! any idea's anyone? It's def not the psu I've tested one I know works.
Could you tell us what kind of video card or motherboard and ram you are running? It would be nice for you to include full system specs. Perhaps then we could start testing to see which component is giving you problems. Seeing as how it started up for some time and then died again it seems that ether the PSU or the motherboard might be at fault, perhaps even the video card? Hard to tell, let us know your specs and we would be able to help you.