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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 4 months ago* (last edited 4 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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[–] hypertown 2 points 4 months ago (2 children)

I might try to disassemble PSU at some point to check since I don't see any on GPU or Motherboard.

(Also I know it can be dangerous but I know my way around high voltage from previous work so I should be fine)

[–] glimse 6 points 4 months ago (1 children)

Please don't disassemble your PSU....touch the wrong part and it can literally kill you

[–] hypertown 2 points 4 months ago

True, usually when you work with high voltage you make sure that everything is unplugged and safe. It's common sense and that's why even though you should call an electrician to change the light bulb nobody will tell you to not do it yourself. PSU is not that simple though. Capacitors can still hold a charge. Unless you got trained for working with high voltage you definitely shouldn't tinker with the PSU.

[–] [email protected] 3 points 4 months ago (1 children)

To add to what others have said. Since your computer runs fine when it's on I wonder if you'll see anything off but I suppose it's worth a shot as it's easy to test. Look up a 24pin diagram and use a multimeter to test if the pins are outputting the correct voltages.

[–] hypertown 1 points 4 months ago (1 children)

In that weird can't power on PC state or it doesn't matter?

[–] [email protected] 2 points 4 months ago

Try the weird state and the seemingly proper on state