+3VALW LINE SHORT Compal ZSO50 LA-A992P rev2.0

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  • pratyush
    Senior Member
    • Sep 2018
    • 69
    • India

    #1

    +3VALW LINE SHORT Compal ZSO50 LA-A992P rev2.0

    Working on this mobo,
    Got 3VALW line short and #PROBLEM IS NOT FROM ALWAYS ON IC(PU301).
    I tried to get other short component but found nothing.
    None of the component is heating in voltage injection test.

    Guide me...

    I hv schematic for ZSO50 LA-A992P rev1.0
    which is same.
    Attached Files
  • pratyush
    Senior Member
    • Sep 2018
    • 69
    • India

    #2
    Re: +3VALW LINE SHORT Compal ZSO50 LA-A992P rev2.0

    Originally posted by pratyush
    Working on this mobo,
    Got 3VALW line short and #PROBLEM IS NOT FROM ALWAYS ON IC(PU301).
    I tried to get other short component but found nothing.
    None of the component is heating in voltage injection test.

    Guide me...

    I hv schematic for ZSO50 LA-A992P rev1.0
    which is same.
    19v line is ok.
    +3VALW is 0
    +5VALW is 0

    +3VALW & BIOS pin no.8 +3V_PCH is also short.

    checked Q30 after removing mosfet drain and source(pin 1&3) both are ground.

    Comment

    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india

      #3
      Re: +3VALW LINE SHORT Compal ZSO50 LA-A992P rev2.0

      Bios Pin8 if short-PCH gone(Can be for other reason but huge chances for PCH gone. In this mb its just one die with cpu+pch soldered onboard.

      Comment

      • mielta
        Badcaps Veteran
        • Apr 2015
        • 368
        • Germany

        #4
        Re: +3VALW LINE SHORT Compal ZSO50 LA-A992P rev2.0

        see at page 12 RC285 and RC182 remove them und messure witch side is shorted

        when shorted side is +3v_dsw_p then cc70 or CPU is defect
        Last edited by mielta; 10-05-2018, 07:38 AM.

        Comment

        • pratyush
          Senior Member
          • Sep 2018
          • 69
          • India

          #5
          Re: +3VALW LINE SHORT Compal ZSO50 LA-A992P rev2.0

          Originally posted by mcplslg123
          Bios Pin8 if short-PCH gone(Can be for other reason but huge chances for PCH gone. In this mb its just one die with cpu+pch soldered onboard.
          CPU+PCH is defected.
          Thanking you!

          Comment

          • pratyush
            Senior Member
            • Sep 2018
            • 69
            • India

            #6
            Re: +3VALW LINE SHORT Compal ZSO50 LA-A992P rev2.0

            Originally posted by mielta
            see at page 12 RC285 and RC182 remove them und messure witch side is shorted

            when shorted side is +3v_dsw_p then cc70 or CPU is defect
            Thank you!

            Comment

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