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What would make a PC to fail to automatically power on after power loss when it's configured to do it like that on the bios?

The PC works well otherwise and sometimes powers on automatically after the power loss, but usually, it doesn't.

EDIT with extra info:

There are in fact 3 different PC's on the same place. Two of them have a biostar 690GTA. The other one has a Gigabyte X299. The three PC are behaving in a similar way. They have debian installed but I don't think that matters.

To "simulate" a power loss I have tried both with the PSU switch and directly removing the power cable.

I don't know the BIOS versions and I don't have access to them right now (remote location), but if it's really necessary I can check.

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    Have you checked if there's a BIOS upgrade that might have a fix for an issue like this? Can you please edit your question and add the BIOS info - manufacturer, model, version?
    – Peregrino69
    Commented Feb 8, 2023 at 18:01
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    What is the OS? Some, like Linux, might better handle an abrupt shutdown.
    – DrMoishe Pippik
    Commented Feb 8, 2023 at 20:30
  • Done @Peregrino69
    – Héctor
    Commented Feb 8, 2023 at 21:01
  • I intended to check whether there are applicable updates, but there are 17 different versions of X299 MoBo... here's the download page. Z690GTA page is here - hope this helps you further.
    – Peregrino69
    Commented Feb 8, 2023 at 21:16

1 Answer 1

Reset to default
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If OS is Windows you may need additional step. Try:

  • Open command prompt (admin)
  • Type bcdedit /set {default} bootstatuspolicy ignoreshutdownfailures [enter]
  • Should return "Operation completed successfully"

enter image description here

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