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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? (lemmy.world)

submitted 4 months ago* (last edited 4 months ago) by [email protected] to c/[email protected]

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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] 0 points 4 months ago (1 children)

I always thought that PSU testers were way more expensive but it's good to know you can buy them relatively cheap. Honestly I'm curious if such a tester would detect anything. Currently the PSU works just fine under heavy load (CPU + GPU stress test). It only happens when I turn off the PC or put it to sleep so low or little to none power draw.

I haven't seen any bad caps on the GPU or motherboard so I'll see on the PSU (obviously with caution).

With GPU it's an easy swap so I once exchanged GPUs with my friend to see if GPU is causing crashes (it was RAM btw) but with PSU I feel it's a lot of work to unplug everything so I don't want to bother them too much. I ordered an MSI 800W PSU. I have two weeks to return it if I want but your idea of having a spare is a good one.

[–] [email protected] 0 points 4 months ago (1 children)

I've had PSUs with odd issues that still worked for the most part, but when I tested them (with my tester) they reflected a weak voltage on one segment or some other failure. But it would still sorta work. These testers do work.

Mine is very similar to the one in this Corsair PSU testing guide. I think it was $15.

https://www.corsair.com/us/en/explorer/diy-builder/power-supply-units/how-to-test-a-psu-power-supply-unit/

[–] [email protected] 0 points 4 months ago

Wow amazing guide. I'll try testing with a multimeter for now but that PSU tester looks very handy. Maybe I'll buy one someday.