Ahyslop

Thnaks for the replies, I've bought and inserted a new PSU and it still doesn't even turn on... So you think the only other option must be a fault in the mother board? Its not that it restarts all the time, it actually doesn't turn on at all.

I don't have an internal speaker so it never beeps :( the model is ga p67a ud3 b3 and no I don't have a spare PSU

Hello, thanks in advance for reading and trying to help. I will start from the beginning to make things clear, I built my own pc about a year ago which has been working perfectly fine until about 5 weeks ago when it started restarting itself when it got to the BIOS, at first I let it keep restarting itself and eventually it actually turned on. It did this a few times which I ignored and assumed it was just a small problem that doesn't need to be seen too because It did boot eventually. However today I turned my computer on after using it yesterday for a long period, the computer started rebooting itself on the bios screen and it done it for about 15 minutes until it stopped on a black screen with a this simble "_" flashing on the top left and then it turned off, but this time it didn't restart. I tried turning it back on but nothing happened, the light was on at the back on my power supply so my computer has power but now thing happens when I press the on button. Can anyone give me any advice on what I should do?