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PC wont turn on, how to identify problem between motherboard and PSU.

My PC starts up for a few seconds and shuts down. I dont have the money to replace both things, so I really need to narrow things down and I cant narrow it down anymore than I have to the PSU or Motherboard.

I've dusted everything completely
I've rewired the case power switch
I opened the psu (I was careful) to check for blown caps/fuses/whatever and dusted it.
I managed to get the PSU to stay on by hotwiring it with a paperclip, with a load from hard and optical drives. But when the main 24pin connector is plugged into the motherboard it wont stay on for more than 5 seconds and I have to cycle the PSU to get it to do anything again.
I tried switching the power buttons on the motherboard to turn it on with the reset button just in case the power button was the problem.

This isnt a fresh new build, and It was running just fine yesterday, even during high draw gaming. I turned it off before i went to bed last night and its not worked since.

I do not have a spare PSU or Motherboard to test with, either :bigfrown:

The issue with it running fine while hotwired but not with the 24 pin plugged in to the MB is whats throwing me for a loop as to narrowing down the problem. If Anyone could please give me a heads up on something to narrow it down so I can get the replacement part ordered while its hopefully on a black friday/cybermonday sale i would be eternally grateful.

that's it, I'm shutting this entire forum down, everyone thank buttcleft

Posts

  • ButtcleftButtcleft Registered User regular
    a neighbor was kind enough to take his PSU out and let me borrow it for testing, which resulted in nothing.

    But..when I put my old psu back in everything was working fine, as long as I didn't tuck the cables away for neatness.

    Which, I suppose means, there is a possible break somewhere in a cable, but at least I'm back and operational (Posted from my once thought dead machine)

    that's it, I'm shutting this entire forum down, everyone thank buttcleft
    Magic Pink
  • nexuscrawlernexuscrawler Registered User regular
    There's also a chance one of the wires was causing a short by touching the mobo

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