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A7S333 1 long beep 3 short beep and shut down ?

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    #81
    Re: A7S333 1 long beep 3 short beep and shut down ?

    all good, it can boot already, POST diagnostic 4141...waiting for boot floppy / hardisk

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      #82
      Re: A7S333 1 long beep 3 short beep and shut down ?

      it's not stable, one of the FET is dissipating too much heat,that's why it's shut down...
      I have about 30 small 0603 ceramic 100nF capacitors...

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        #83
        Re: A7S333 1 long beep 3 short beep and shut down ?

        it's not stable, one of the FET is dissipating too much heat,that's why it's shut down...
        I have about 30 small 0603 ceramic 100nF capacitors...

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          #84
          Re: A7S333 1 long beep 3 short beep and shut down ?

          what's the valid value for NTC (CPU sensor) I got only 1 ohm on my meter in circuit measurement...

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            #85
            Re: A7S333 1 long beep 3 short beep and shut down ?

            I got NTC value = 1 ohm below the CPU....can it be the main problem ??

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              #86
              Re: A7S333 1 long beep 3 short beep and shut down ?

              Done fixing it....POST successfull....I must hold the heatsink and put thermal paste for it...
              and it's POST until displaying boot message in VGA....tada..!!!

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                #87
                Re: A7S333 1 long beep 3 short beep and shut down ?

                It's working now after replacing some FETs, caps and buck controller..NTC as well..
                Have a watch
                https://youtu.be/8GvkgeF9yZ8
                https://youtu.be/oLdyBep7vNg

                cheers everyone

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                  #88
                  Re: A7S333 1 long beep 3 short beep and shut down ?

                  Good save!
                  Makes me wonder what exactly the problem was, though.

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