Motherboard booted now it doesn't

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  • Solder Boy
    Senior Member
    • Nov 2006
    • 178
    #1

    Motherboard booted now it doesn't

    One of the motherboards I was testing booted up okay initially but when I went into CMOS to change the date and time and hit F10 to save and reboot the bloody thing shut right off and now it doesn't boot.

    It starts for 2 seconds then shuts off just as quick.

    Does an acceptable ESR range necessarily mean the cap is good?

    Thanks.
    www.bcrelectronics.ca
    Tags: None
    • PCBONEZ
      Grumpy Old Fart
      • Aug 2005
      • 10661
      • USA
      #2
      Re: Motherboard booted now it doesn't

      > Does an acceptable ESR range necessarily mean the cap is good? <

      No but it's more reliable than other tests in weeding out duds.
      It's unusual for ESR to be good and something else bad.

      A cap with good uF (capacitance) reading and bad ESR on the other hand is common.

      .
      Mann-Made Global Warming.
      - We should be more concerned about the Intellectual Climate.
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      Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
      - Dr Seuss
      -
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      -

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        • tazwegion
          Badcaps Veteran
          • Jun 2006
          • 444
          • Australia
          #3
          Re: Motherboard booted now it doesn't

          Did you pull the CMOS battery out (and jumper the 'clear BIOS' pins)? leave it sit like that for a while letting the residual current drain from the BIOS chip and you should be able to get it back up and running... I've been having the same issue recently with an MSI KT3 Ultra2 that I'm assessing whether to bother recapping or not, it has a sprinkling of quality caps but also some Teapo 1000uF 6.3v clusters
          Viva LA Retro!

            Comment

            • PCBONEZ
              Grumpy Old Fart
              • Aug 2005
              • 10661
              • USA
              #4
              Re: Motherboard booted now it doesn't

              Take out CMOS battery when you recap.

              When you clear CMOS w/jumper or by removing battery have it unplugged too or CMOS will be powered by +5vsb and reset attempt will do nothing.

              .
              Mann-Made Global Warming.
              - We should be more concerned about the Intellectual Climate.
              -
              Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
              - Dr Seuss
              -
              You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
              -

                Comment

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