A1466 - 820-00165-A No Boot No Fan Spin

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  • applejuice95
    Member
    • May 2023
    • 41
    • United States
    #1

    A1466 - 820-00165-A No Boot No Fan Spin

    Hello, we have an 820-00165-A Board.. Does not power ON, Fan does not spin. Charger light is ON

    Charger light is green or amber, functioning based on battery charge. (Charging - Amber) (Fully Charged-Green)

    The light does not change from amber to green, when resetting the SMC.

    With board on bench removed from mac, new I/O board and cable hooked up. When plugged in, amber light, no power. Confirmed with tester pads as well for the power button.

    PPBUS_G3H = 8.6V

    SMC_PM_G2_EN = 3.4V

    U7100 under thermal is glowing very hot when plugged in. no pulse, just solid hot glow.

    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14333
      • Canada
      #2
      U7100 is likely the root cause.

      Review this flowchart:

      G3 to S3 State for Ivy Bridge Haswell and Broadwell - LogiWiki

        Comment

        • applejuice95
          Member
          • May 2023
          • 41
          • United States
          #3
          Replaced from donor board, still the only thing glowing. Its only at 27c though. Nothing crazy.

          Thank you for the power sequence chart. Thats actually really nicely broken down.

            Comment

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