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PC sometimes won't turn on until I unplug it from the wall for a 30 seconds or so. Faulty PSU? (self.pcmasterrace)

submitted 5 months ago* (last edited 5 months ago) by hypertown to c/pcmasterrace

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Just like in the title my PC has an issue when it won't turn on. Power button does nothing, fans do not spin, PC is completely dead. First time it happened was when I put it to sleep, sometimes it wouldn't wake up so I just avoided putting it to sleep as a temporary solution that become quite permanent... Simple power off worked well enough but recently it won't start even when I turn it off. If that happens I need to flip the power button on the PSU for a 30 or so seconds then it turn it back on and I can start PC no problems.

From what I read on the Internet people suggest faulty PSU. Is there a way to confirm that? I don't want to buy a new PSU if the old one is still good. It has little over 5 years so it's not exactly new but certainly not too old.

I also had one crash that looked like PSU fault since PC just shut down suddenly but I blamed it on some power drop in the grid at the time.

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[–] [email protected] 3 points 5 months ago (4 children)

You can probably do a "paper clip" test to help you confirm its the PSU and nothing else. Basically removing the PSU and connecting a paperclip to specific pins on the PSU to act like an "ON" button.

But based on the symptoms you've indicated, it does sound like a PSU problem. Nollij's idea of buying another PSU that would allow you to return it sounds like another good solution/test.

[–] hypertown 2 points 5 months ago* (last edited 5 months ago) (3 children)

I thought about it but idk if it'd be safe to remove 24 pin while plugged in. I can't disconnect it though as after unplugging it works just fine.

[–] [email protected] 4 points 5 months ago (2 children)

Just get a PSU from the store and test it on your. It'll tell you very quickly without risking a potential fire hazard.

[–] hypertown 1 points 5 months ago (1 children)

I was more worried about frying the motherboard but I guess it's not entirely impossible to blow up the PSU...

[–] [email protected] 2 points 5 months ago

Fire hazard being messing something up by tinkering with the PSU. It's not worth it over something that can be replaced for so little money. And I think it's just more about swap out the most likely failing component (the PSU) and see if the problem goes away. If it doesn't then you know it wasn't the PSU.