MacBook A2442 power cycling

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  • macabook
    Member
    • Sep 2024
    • 22
    • France
    #1

    MacBook A2442 power cycling

    Hi, having an issue with A2442 getting 20v around 200mA cycling every 2 or 3 second, same on every usb-c Port. No water damage. PP3V8_AON is 0.100 in diode mode and 100Ohm resistance to ground. When I measure the voltage it 3.8v stable that goes on and off every 2 to 3 second. When I inject voltage it doesn’t consume much only 6mA that is not a short.

    Compared to similar broad diode mode is 0.330 and resistance in kilo.

    I don’t know what to do next ?
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 13840
      • Canada
      #2
      Test with a known good battery.
      Test with a DFU.

      https://boards.rossmanngroup.com/thr...0/#post-113047

        Comment

        • macabook
          Member
          • Sep 2024
          • 22
          • France
          #3
          Thanks mon,
          I tried a restore on DFU mode that fails with error 21, the power cycling is no more happening. I tried many times still getting error 21. According logi.wiki it's most probably a NAND issue like the case you shared on Rossmanngroup.

            Comment

            • macabook
              Member
              • Sep 2024
              • 22
              • France
              #4
              The MacBook finally restored in DFU mode, it was my mistake trying to restore it while on recovery mode (blue MacBook image showing on configuratore 2). I entered DFU with keyboard combinaison and the restore successfully finished on the first attempt.

                Comment

                • mon2
                  Badcaps Legend
                  • Dec 2019
                  • 13840
                  • Canada
                  #5
                  Excellent.

                    Comment

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