Macbook Pro A2289 - 820-01987 - No video output

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  • anhbanxoi
    Senior Member
    • Sep 2021
    • 173
    • VN
    #1

    Macbook Pro A2289 - 820-01987 - No video output

    Hello,
    I have this MacBook with a pretty clean motherboard battery that has only 4 cycle counts but no video output on screen, even with external screen.
    I tried to restore with Apple Configurator and it can finish this process sucessfully but still no video output (usually during restore with dfu mode a apple logo will appear)

    I also followed T2 power sequence and seem like all power are up and running ( I got this signal ALL_SYS_PWRGD)

    CPU get warm, fan spin, touchpad clicking, no chime sound, current draw around 0.6A without battery.

    Do you guys have any suggestions in this case?

    Thank you
    Tags: None
    • ugamazing
      Senior Member
      • Jun 2013
      • 165
      • usa
      #2
      Re: Macbook Pro A2289 - 820-01987 - No video output

      Have you checked RTG on all CPU/eGPU coils?

        Comment

        • anhbanxoi
          Senior Member
          • Sep 2021
          • 173
          • VN
          #3
          Re: Macbook Pro A2289 - 820-01987 - No video output

          Originally posted by ugamazing
          Have you checked RTG on all CPU/eGPU coils?
          I just reflow the RAM and it's now working fine.

          Thank you for the information from your topic.

            Comment

            • ugamazing
              Senior Member
              • Jun 2013
              • 165
              • usa
              #4
              Re: Macbook Pro A2289 - 820-01987 - No video output

              Way to go! Yes I suspected a possible RAM issue on some of these, and will try to reflow some later to see.

                Comment

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