MACBOOK A2337 NO POWER

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  • madjid911
    Badcaps Veteran
    • Dec 2016
    • 387
    • France

    #1

    MACBOOK A2337 NO POWER

    Hello, I'm trying to repair my MacBook Air A2337 820-0216-A, which does not start. It's stuck on 5V, the motherboard is not drawing power, and there's no liquid damage or shorts found.

    Since I had PPBUS_AON but not PP1V8_AON, I replaced the U710 PMIC chip with one from a working donor motherboard (iCloud). The result is the same. Here are the measurement :

    3V8_AON : 3V8
    PPBUS_AON : 12V28
    PP3V3_S2_UPC : 0V5
    PP3V3_S2 : 0V
    PP1V8_AON : 0V no short
    PP3V8_AON :3V8
    P3V8AON_PWR_EN_R : 5V
    the trackpad does not click

    I can't tell if the PMIC is receiving the activation signal. Maybe the M1 SoC is dead?

    Thanks for your help, I'm just a beginner.
  • mon2
    Badcaps Legend
    • Dec 2019
    • 14073
    • Canada

    #2
    MacBook Air A2337 820-02016-A

    Remove all power. Meter in resistance mode. Measure the resistance to ground of PP3V3_S2_UPC. Post the measurement.

    Comment

    • madjid911
      Badcaps Veteran
      • Dec 2016
      • 387
      • France

      #3
      thank you for your help

      PP3V3_S2_UPCP : ​ Between 150 KOMHS and 6 MOHMS Unstable value

      Comment

      • mon2
        Badcaps Legend
        • Dec 2019
        • 14073
        • Canada

        #4
        This rail is not shorted but also not enabled.

        Check if the PP1V2_S2 rail created by U8100 is present.

        Your case may be similar to this one:

        https://boards.rossmanngroup.com/thr...02020-a.63479/

        Comment

        • madjid911
          Badcaps Veteran
          • Dec 2016
          • 387
          • France

          #5
          Originally posted by mon2
          This rail is not shorted but also not enabled.

          Check if the PP1V2_S2 rail created by U8100 is present.

          Your case may be similar to this one:

          https://boards.rossmanngroup.com/thr...02020-a.63479/
          PP1V2_S2 0v 21KOHMS
          On Roussman's website it says to change U8100 but it's a big component that I wouldn't be able to replace.

          Comment

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