macbook air m1 820-02020 cant restore on reinstall osx.

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  • dellxps15
    Badcaps Legend
    • Feb 2014
    • 1591
    • italy

    #1

    macbook air m1 820-02020 cant restore on reinstall osx.

    hi all, just got this macbook from a parent. it was previously water spilled. my cousing took it to a repair shop where they cleaned the water spot corrosion and make it boot again, but they were not able to reinstall osx. after that my cousing bring it to me, but im facing same problem. neither in dfu, usb osx installation media , neither internet recovery works.
    in disk utility, it see 245gb ssd, i can inizialize it and start reinstalling osx, but at some point it will give me error. i read somewhere that it could be a bad caps, but all values loks good. i checked also pp5v_s2 coil and it's not shorted.
    im asking here if u can guide me to fine the problem.

    PS: the cpu heatsink is really cold. could that be because board was ultrasonic clean and it clean also the thermal paste from cpu die to cpu shield ? when i google for air m1 cpu temp i see lots of people blame for itbeing really hot, while the whole time i had the pc turned on , it was really cold on cpu side.
  • mon2
    Badcaps Legend
    • Dec 2019
    • 14334
    • Canada

    #2
    What is the error?

    What are the voltage to ground measurements for the ssd rails?

    Comment

    • dellxps15
      Badcaps Legend
      • Feb 2014
      • 1591
      • italy

      #3
      hi mon

      diode value are the following:
      2,25 : 0.900
      1,25: 0.640
      0.88 : 1.220
      0,9 and 1,2 i have to remove board as they are on the other side of it.

      the error is: there was a problem during installation. it's just a generic error....

      Comment

      • dellxps15
        Badcaps Legend
        • Feb 2014
        • 1591
        • italy

        #4
        fixed it yesterday after getting in more error message focus.
        https://www.youtube.com/watch?v=duXxWDUk2UI
        i come into this video and after doing that macbook worked again

        Comment

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