I shut down my computer and now it won't turn on again

Rasm835g

Reputable
Jul 12, 2014
2
0
4,510
I shut off my desktop pc, It was all working fine, the only thing I did on it was google something, And then Windows had some updates. About an hour later when I try to turn it on, it wont start. I have had it opened and there are no signs of power entering into the computer, no lights or anything. Please help

EDIT: After a while I tried turning it on again, plugged in and open so i could see, My GS500 Corsair PSU lights up for a second and then just turns off again, what could cause this?
 

Rasm835g

Reputable
Jul 12, 2014
2
0
4,510


I don't have a spare psu laying around, and I have tried plugging it straight into the wall, and have gone the power cables inside over as well..