PC won't boot unless PSU is turned off and on.

Hey people

I've recently built a rig for a friend, and after some initial trouble, everything worked fine... For a day. Now the PC won't boot unless you flick the on/off-button on the PSU.
I've looked around on the net, and as far as I can tell it could be an issue with the MB.
Do anyone have any experience with this sort of thing? Is it a faulty MB or is it something that can be fixed?

Best regards
2 answers Last reply Best Answer
More about boot psu turned
  1. System specs please!
  2. Best answer
    ive seen an old dell computer that did this. the entire thing took a dump even after everything was replaced. the motherboard was the problem.

    check the motherboard and see if you have any bulging capacitors.
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