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Apple Macbook A1398 Turns off randomly

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    #1

    Apple Macbook A1398 Turns off randomly

    Hi,

    I have a problem on a Macbook A1398 with motherboard 820-3787-A.
    It works fine, but sometimes it turns off.
    I noticed that it happens more frequently with the battery plugged, so I changed the battery, but it does the same.
    It also heats up a lot.

    Any suggestions?

    Thank you
    Tags: None
    #2
    Re: Apple Macbook A1398 Turns off randomly

    Could be a thermal shutdown due to blocked exhaust vents. How dirty is the inside of the machine? Give it a good cleaning. Is the fan moving (if one is present)? The heatsink compound for the CPU could also be dry due to the age of the machine which will require a fresh application.

    Comment

      #3
      Re: Apple Macbook A1398 Turns off randomly

      Turns off suddenly or freezes/goes black screen (possibly with fans spinning fast) and turning off a short after after?
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

      Comment

        #4
        Re: Apple Macbook A1398 Turns off randomly

        Originally posted by mon2 View Post
        Could be a thermal shutdown due to blocked exhaust vents. How dirty is the inside of the machine? Give it a good cleaning. Is the fan moving (if one is present)? The heatsink compound for the CPU could also be dry due to the age of the machine which will require a fresh application.
        I had thought that, so I cleaned it and changed the heatisink compound, but nothing changed. The fans work fine.

        Comment

          #5
          Re: Apple Macbook A1398 Turns off randomly

          Originally posted by piernov View Post
          Turns off suddenly or freezes/goes black screen (possibly with fans spinning fast) and turning off a short after after?
          It turns off suddenly, and sometimes it reboots.

          Comment

            #6
            Re: Apple Macbook A1398 Turns off randomly

            Originally posted by Eleways View Post
            It turns off suddenly, and sometimes it reboots.
            i think think it's one of these problems? https://boards.rossmanngroup.com/thr...y-ideas.52234/, https://boards.rossmanngroup.com/thr...ng-down.60637/

            i think you can test this with disabling thunderbolt
            Last edited by rediii; 04-01-2021, 05:08 AM.

            Comment

              #7
              Re: Apple Macbook A1398 Turns off randomly

              What model year is the MacBook Pro?
              U8900 bad chip connections is a well known issue on the 2012-2013 models. Use solder paste and re-solder the pins with a micro tip soldering iron. This usually brings it back.

              Comment

                #8
                Re: Apple Macbook A1398 Turns off randomly

                820-3787 is the L2013 model. Doesn't have U8900 solder joints defect. It's still not impossible to have an issue with U9300 but very unlikely.
                OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

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