Motherboards that powers on when plugged in

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  • aznmagic20
    New Member
    • Aug 2010
    • 2

    #1

    Motherboards that powers on when plugged in

    I work as a repair tech at a system manufacturing company and I have to repair a large number of system each day. What I noticed is that I get a large amount of systems that power on as soon its plugged in. The ones that don't post I wont waste much time with, but its the ones that post and burned tested without problems that has me perplexed.

    With problems like Bios settings, WOL and Last State, Power Supply, and CMOS battery aside (have access to fresh equipment as needed) even when the motherboard is taken out and placed with minimum setup (PS, MB, 1 working Mem, 1 working CPU, fresh battery) it would still turn on as soon as its plugged in.

    So I'm hoping somebody can give me their opinion. I'm not looking for an answer so much as if there can be any additional possible problems and solutions. Changing the MB is always an option its just that I want to keep it as a last resort.

    Thanks in advance
  • mockingbird
    Badcaps Legend
    • Dec 2008
    • 5484
    • -

    #2
    Re: Motherboards that powers on when plugged in

    Look for a setting in the bios called "Last State".

    Comment

    • aznmagic20
      New Member
      • Aug 2010
      • 2

      #3
      Re: Motherboards that powers on when plugged in

      Bios settings like Wake up on Lan is Disabled and "On A/C power Loss" is set to Off. I generally check the bios first for settings that can turn on the board so its generally not a Bios problem.

      Comment

      • ratdude747
        Black Sheep
        • Nov 2008
        • 17136
        • USA

        #4
        Re: Motherboards that powers on when plugged in

        funky power button?
        sigpic

        (Insert witty quote here)

        Comment

        • Per Hansson
          Super Moderator
          • Jul 2005
          • 5895
          • Sweden

          #5
          Re: Motherboards that powers on when plugged in

          Read the posts by PCBONEZ on this thread (page 3)
          It could be several things, but likely suspects are the tiny caps on the mobo...

          https://www.badcaps.net/forum/showth...t=10336&page=3
          "The one who says it cannot be done should never interrupt the one who is doing it."

          Comment

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