Macbook Air 820-3437 - Random Re-boots

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  • fred23456
    Member
    • Apr 2019
    • 14
    • United Kingdom
    #1

    Macbook Air 820-3437 - Random Re-boots

    Hi all,

    Got a Macbook Air 820-3437. Had liquid damage and has had quite a lot of repair work done on it to get it where it is now.

    It now passes everything in ASD and boots to the OS, all be it a little slowly, the loading bar on boot takes a few seconds and usually stalls at about 60%. Once in the OS everything is normal, computer runs as fast as ever and CPU idles at around 40 degrees C.

    After about 20-30 minutes the computer will turn off and immediately restart. Sometimes the "your computer turned off because of an issue" message pops up, sometimes it does not. Occasionally it restarts a few times in a loop before getting to the OS.

    Any help with what I can do to attempt to diagnose this issue would be much appreciated!
    Tags: None
    • piernov
      Super Moderator
      • Jan 2016
      • 4435
      • France
      #2
      Re: Macbook Air 820-3437 - Random Re-boots

      Tried another SSD? (or external drive with macOS on it)

      Otherwise, not sure but could be ME region issue. Was the EFI messed with?
      Try to run Memtest too, you never know.
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        • fred23456
          Member
          • Apr 2019
          • 14
          • United Kingdom
          #3
          Re: Macbook Air 820-3437 - Random Re-boots

          I haven't got another SSD unfortunately. Just tested it using ASD on a USB stick, selected all tests and let it run, it rebooted during that as well, twice in a row.

          The EFI is untouched and I just tried running memtest, computer shuts down before it has time to finish!
          Last edited by fred23456; 05-30-2019, 10:46 AM. Reason: Further Information

            Comment

            • fred23456
              Member
              • Apr 2019
              • 14
              • United Kingdom
              #4
              Re: Macbook Air 820-3437 - Random Re-boots

              For anyone looking for a solution to a similar problem, this ended up being solved by the ultrasonic cleaner. I'm assuming it was corrosion under the SMC as suggested on another forum.

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