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.
    Tags: None
    • 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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