Shorting Motherboard PWR Pins Does Nothing

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  • SashaG
    Member
    • Feb 2022
    • 11
    • Philippines
    #1

    Shorting Motherboard PWR Pins Does Nothing

    This is a bench test so I've tried booting without components (No SSD, No GPU, With/Without RAM, With/Without CPU). I only have the CPU Fan plugged in and Buzzers.

    PSU is all good. 5VSB present, standby LEDS light up. No shorted MOSFETS on CPU. I know there has to be a short somewhere. Anyone has an idea where to start looking? Thanks!
    Tags: None
    • Dan81
      SNES-powered
      • Oct 2013
      • 1866
      • Romania
      #2
      Re: Shorting Motherboard PWR Pins Does Nothing

      Sounds a bit funny but I'd try shorting the green and black wire. I had a semi-dead ASUS P5ND2 boot that way.
      Main rig:
      Gigabyte B75M-D3H
      Core i5-3470 3.60GHz
      Gigabyte Geforce GTX650 1GB GDDR5
      16GB DDR3-1600
      Samsung SH-224AB DVD-RW
      FSP Bluestorm II 500W (recapped)
      120GB ADATA + 2x Seagate Barracuda ES.2 ST31000340NS 1TB
      Delux MG760 case

        Comment

        • SMDFlea
          Super Moderator
          • Jan 2018
          • 21293
          • UK
          #3
          Re: Shorting Motherboard PWR Pins Does Nothing

          Originally posted by SashaG
          This is a bench test so I've tried booting without components (No SSD, No GPU, With/Without RAM, With/Without CPU). I only have the CPU Fan plugged in and Buzzers.

          PSU is all good. 5VSB present, standby LEDS light up. No shorted MOSFETS on CPU. I know there has to be a short somewhere. Anyone has an idea where to start looking? Thanks!
          It might help if you posted the motherboard model number
          All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

            Comment

            • MasterCap
              Member
              • Jul 2022
              • 37
              • Canada
              #4
              Re: Shorting Motherboard PWR Pins Does Nothing

              Probably not the same thing at all, but I have a new z690 mobo, and it does not always respond to the PWR button when trying to turn on. Somehow the BIOS chooses to ignore it.

              I don't think in the old days, a BIOS would ever ignore the turn on signal, maybe it's a windows thing, and I wish they'd leave the BIOS alone.

                Comment

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