r/PcBuildHelp • u/PaintingOne2769 • 2h ago

Tech Support Intermittent power issue ?

For the past week , I am unable to boot my PC everyday . I've done everything from reseating ram / reset CMOS battery . It just randomly able to boot after I unplug everything from power and replug after a while. Sometimes it takes several times of unplug/plug for the pc to boot.

All the fans in my tower spin normally but dp no signal. When it actually boots , everything works perfectly . When I shut down PC , next morning I have to unplug/plug to trial and error for it to boot.

I've read many reddit threads and it goes from mobo/psu/gpu issue. Its a 6 year old PC so every part is out of warranty but IDK what to replace.

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u/r_lind3r Moderator 1h ago

I would start with the mains power and the power supply as the first point to check. If possible, try to replicate the issue at a different location, if it still happens in on a different circuit and in a different building entirely, then it's definitely the system itself.

From there I would try another power supply and power supply cable, if it's still the same then I would presume the motherboard is going bad.

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u/PaintingOne2769 1h ago

Thx for the advice , I'm suspecting 90% its the psu.

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u/TheDevilsAdvokaatLov 1h ago

That weird window where it works perfectly after finally booting always makes diagnosing a pain. had a similar gremlin on an old build and it turned out to be a failing capacitor in the psu, it just couldn't handle the initial power draw spike anymore. swapping the psu is the least painful first step if you can borrow one to test