I just built a computer for a friend of mine, we pushed the button to turn it on, it started up but then just shut off in a minute, we havnt installed an os yet but we can never get to it. So then we try pushing the button and nothing happens, sooner or later after a 100 oushes it will reandomly go on again, but then shut off in a minute. So the thing is , we want to know what could be the problem, we are pretty sure its not the power supply because when it shuts off randomly the light on the motherboard is still in tact. I think it is the mother board, but i just want to know what you guys think.