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820-2879-B PPBUS_g3h is coming 12.6V then gradually going to 0.v in 20-30 seconds

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  • 820-2879-B PPBUS_g3h is coming 12.6V then gradually going to 0.v in 20-30 seconds

    Hi All,

    This is not a liquid damaged macbook. how ever got moisture near C6990. Earlier no pp3v42_g3h . I replaced the caps and now i have steady
    PP3V42_g3h. But PPBUS_G3H is coming 12.6v then gradually going down.

    I replaced ISL625 and Q7020,Q7035. no change.

    Any clue?

  • #2
    Check if 3V3_S5 tries to appear.
    L7030 voltage steady without F7040?

    Comment


    • #3
      Spot on. #v3_s5 was shorted. Replaced the shorted caps fan spinning. Thank you so much for your help.

      Comment

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