r/techsupport • u/wchin1 • 2h ago

Open | Hardware Pc turns off after 2 mins

I have been having an issue where I turn on my PC from a cold boot and it runs for about 2-5 mins and then turns off.

On the motherboard the CPU light is also on and remains solid now when I turn it on. The CPU fan does spin as soon as I turn it on.

It then will flicker seeming in an attempt to power back on but then quickly turns back off

I have replaced the PSU today to see if this was the problem. It worked for about 5 mins again and then turned off again.

I also had replaced the thermal paste on the CPU to see if that may have been the problem but that also didn't work.

I have attempted to reseat the ram.

I am at a loss for what I should do. I feel like I have exhausted many of the possible solutions and I am in desperate need of help.

Thank you in advance to anyone willing to help me.

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u/NeutralBot 2h ago

Could be motherboard I literally just had something like this. Check windows event viewer and see what kind of code its giving you, that should be a big clue. I had a local install of codex diagnosing stuff for me but with a window of only 5 mins you may not have time for it. I think mine was event 41 meaning abrupt power failure.

I'd check cables, then RAM (sounds like you have), then PSU (sounds like you have and can cross that off the list), honestly your symptoms remind me of my own. My pc randomly shut off one day and then it progressively got worse till starting it up led to the lights just flickering on for a second before power down then it would try to power up again.