Apple MBP 15" 2012 820-3330-B Defekt GPU

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  • Roman78
    Senior Member
    • Oct 2017
    • 54
    • Germany

    #1

    Apple MBP 15" 2012 820-3330-B Defekt GPU

    I got a 2012 MBP non retina over here with a defective GPU. So what i did is almost the same as on the 2011 models and disabled the dedicate GPU, but the display stays black.

    I entered the following in the terminal:

    sudo nvram boot-args=”nv_disable=1″

    and

    sudo nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefs=%01%00%00%00

    and removed a Resistor for powering the U8900. I did this successfully on another 2012 MBP and documented this here: https://www.die-oswalds.de/blog/2019...r-grafikkarte/

    But this one stays black. The MBP turns on and i can remotely to this one and also use an external GPU, both works. But the Display just wont turn on. When i on the device i can see the dedicated GPU is turned off, i only see the inter from the CPU. What could i do now?
  • piernov
    Super Moderator
    • Jan 2016
    • 4435
    • France

    #2
    Re: Apple MBP 15" 2012 820-3330-B Defekt GPU

    How did you diagnose this machine has a dead GPU? Those rarely die.
    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

    Comment

    • ktmmotocross
      Boardkiller
      • Feb 2014
      • 3580
      • slovakia

      #3
      Re: Apple MBP 15" 2012 820-3330-B Defekt GPU

      not rarely. i reballed some of these because of no display. even cpu have bad balls, so one of memory module dont work

      Comment

      • Roman78
        Senior Member
        • Oct 2017
        • 54
        • Germany

        #4
        Re: Apple MBP 15" 2012 820-3330-B Defekt GPU

        Well, they don't die as much as those 2011, but they die sometimes. It had the typical symptoms. This is the second 2012 non retina i got here with a defective GPU.

        Comment

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