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  1. #1
    amateur expert dugimodo's Avatar
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    Default pc random power loss

    3 or 4 times in the last 2 days my pc has just stopped as if the power went off. The power and reset buttons do nothing and oddly the rgb lighting stays on. I have to switch the psu off for a few seconds to make it go again.
    cpu Temps are fine, haven't checked any others as yet.

    I'm thinking the psu is the likely suspect, any other suggestions?
    PC is nearly 3 years old

    650W cooler master mwe gold psu
    gigabyte gtx 1070
    ryzen 2700x

    planning to try swapping the psu and cleaning out the dust this weekend.
    Last edited by dugimodo; 26-05-2021 at 08:10 PM.
    Ryzen 2700X, 16Gb DDR4RAM, 512GB M.2 NVME SSD, MSI GTX1070

  2. #2
    Enterprise IT Consultant chiefnz's Avatar
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    Default Re: pc random power loss

    Try reseating all the power connectors to internal cards and the motherboard etc.

    Asus PRIME Z370-P
    Core i7-8700K @ 5GHz
    Corsair Hydro H100x
    32GB DDR4 @ 3200MHz
    Intel 660P 512GB M.2 NVMe
    Crucial P1 1TB M.2 NVMe
    Gigabyte RTX 2060 OC
    Corsair Crystal 460X
    EVGA SuperNOVA G+ 650W

  3. #3
    Senior Member piroska's Avatar
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    Default Re: pc random power loss

    Yep, PSU. They can fail in odd ways...I had one once that would power up the PC but you'd get a no O/S error, cause the HDDs/optical wouldn't power up.
    New PSU cured it.
    Ex-pctek

  4. #4
    amateur expert dugimodo's Avatar
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    Default Re: pc random power loss

    kinda hope it is the PSU, still has 2 years of warranty left.
    Ryzen 2700X, 16Gb DDR4RAM, 512GB M.2 NVME SSD, MSI GTX1070

  5. #5
    amateur expert dugimodo's Avatar
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    Default Re: pc random power loss

    Replaced the psu, so far no more power issues but now I'm getting micro pauses in game and losing audio sync with videos on YouTube, Netflix, vlc. Going to try reinstalling the audio drivers.....

  6. #6
    amateur expert dugimodo's Avatar
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    Default Re: pc random power loss

    So, no more power problems touch wood.....

    BUT windows is a bit screwed up, I'm guessing some file corruption or something. As mention earlier having audio sync issues and micro pauses.

    got this from latency monitor Click image for larger version. 

Name:	Capture.jpg 
Views:	28 
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ID:	10923

    which suggests it's a problem with the AHCI storport mini driver but I can find no way to fix it so far. SFC did something to corrupt files but didn't fix it, windows updates didn't help.
    I have an unrelated restorepoint that might be my next attempt. Currently backing up files in case I have to reinstall.
    Ryzen 2700X, 16Gb DDR4RAM, 512GB M.2 NVME SSD, MSI GTX1070

  7. #7
    Senior Member piroska's Avatar
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    Default Re: pc random power loss

    Not having much luck are you...
    Ex-pctek

  8. #8
    Computer "Specialist" Agent_24's Avatar
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    Default Re: pc random power loss

    It sounds like the old PSU was faulty. It may have had high noise/ripple and damaged something else.
    Non-system disk or disk error. Replace and strike any key when ready.

  9. #9
    amateur expert dugimodo's Avatar
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    Default Re: pc random power loss

    About to do a clean install, reset my pc using the windows tool and it seems ok to be honest but that latency tool still says it's screwed, not sure I trust it but the reset blew everything away anyway so now's the time for a clean install.

    FYI things that didn't work
    system restore
    SFC
    DISM
    reinstalled Audio & Video drivers
    Validated and reinstalled the game that was the worst affected

    All of which still left me with micro pauses and audio sync issues.
    The windows reset did appear to fix those, dunno what the latency tool is on about.
    Ryzen 2700X, 16Gb DDR4RAM, 512GB M.2 NVME SSD, MSI GTX1070

  10. #10
    amateur expert dugimodo's Avatar
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    Default Re: pc random power loss

    Soooo PC is fixed, fresh install of windows and a whole lot of software to reinstall over the next few days...

    Thought I'd killed it with a BIOS update after noticing the BIOS had reverted back to a 2018 version (weird, I know I updated it to the latest a month ago in case I buy a newer CPU - think the dual BIOS must have kicked in).

    So it turns out all the problems I've been having since swapping the PSU are down to a loose sata cable on the optical drive, which is both a relief and bloody annoying.
    The question I have now that I'd like some opinions on is do we think my PSU is faulty or could a sata cable cause sudden power loss? I don't think it's likely myself.
    Ryzen 2700X, 16Gb DDR4RAM, 512GB M.2 NVME SSD, MSI GTX1070

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