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I put my windows PC into sleep mode and came back hours later to see it completely powered off. Pressing the power button does absolutely nothing. Here's what I've tried:

  • I/O switch set to I
  • verified all internal wires are plugged in
  • paperclip PSU test (it worked)
  • shorting the powerbtn pins (didn't work)
  • verified both the external power wire and the power strip work

I've had this skytech archangel PC since 2017, and I did nothing to cause this, so what could be happening?

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  • Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer.
    – Community Bot
    Commented Nov 22, 2023 at 21:48
  • something important may have died (if there's really absolutely no signs of life, it's most likely the motherboard) - however: disconnect everything unimportant (hard drives etc), remove and re-attach power cables to the motherboard. Remove and reseat RAM, and if you can, remove and reseat CPU (you may want thermal paste on hand, after 6 years you'll need to clean and re-apply thermal paste). Then try again. All you want attached is power to the motherboard, RAM, CPU, Graphics card if your CPU doesn't include integrated graphics
    – Jaromanda X
    Commented Nov 22, 2023 at 23:26
  • ^^^ if it powers on, then re-attach things one by one (with the power off of course) powering on after each new device is attached
    – Jaromanda X
    Commented Nov 22, 2023 at 23:27
  • Hey, so I just woke up and read these. As sort of a cope, I pressed the power button and it turned on. What in tarnation could have been causing it to stay powered off for 4 days?
    – Pixelated Lagg
    Commented Nov 23, 2023 at 13:25

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