Computer won't boot after power outage

I've been unable to get my desktop computer to boot after a power outage last weekend. I was using my computer and everything was working fine. At first my lights and screen flashed on and off a couple times really quickly (the computer did not shut down). After a minute or two (with my computer still turned on), the power shut off for good. Now my power has been restored and I have been unable to get my computer to boot.

Some details: If I leave the computer off for a day or so, the first time I try to turn it on, it will start the boot process and start loading windows. It successfully booted to windows once, but most of the time it locks up at some point during the boot process.

After I have tried to boot the computer once, I will never be able to get it to POST again until I let it sit cold for a long while (a day or so). If I try to turn on the computer, the motherboard, fans, etc will all turn on, but nothing of consequence will happen. I get seemingly different bios boot codes every time so I don't think that's reliable.

I was using a power strip, but from what I've been reading about it on the internet, I don't think it is a surge protector as well, which is unfortunate.

The kicker: If I unplug the computer, and hold the power/reset buttons down for a couple minutes, the computer will behave as if it was a cold reboot. It will still lockup and be unusable at some point during the boot process though.

From what googling i've done, it seems like I might have a motherboard or power supply issue, but I'm not really sure. I don't have a spare power supply so I wanted to get some advice before I went out and purchased a new one.

Any thoughts? Any help is much appreciated!
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  1. Power supply sounds like the culprit. That is where I would start.

    If you're concerned about cost, check the warranty coverage on it.
  2. gmkos said:
    Power supply sounds like the culprit. That is where I would start.

    If you're concerned about cost, check the warranty coverage on it.


    Thanks for the advice. I think the warranty has expired on my power supply, so I think I'm out of luck there. My friend says he has an extra power supply I can borrow so I'm going to try that.
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