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A1989 - replace SSD

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    #1

    A1989 - replace SSD

    I have one A1989 that have not internal LCD (there was water damage on LCD connector) but macbook itself was working fine.
    After some time it stoped working and starts in Recovery mode. When i try to restore in DFU it always fails with error : AMRestoreErrorDomain error 75 - Failed to handle message type StatusMsg (Missing data volume))

    Is it possible to just swap SSD from some other macbook ? (or it have some dependecies ? A1989 only, some special possition from donor to correct possition on my macbook ? or i can take any SSD chips from any other macbook (with T2) and put it on all occupied slots ?
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    #2
    OK i found same motherboard a1989 and i have transfered all 4 ssd chips (to exactly same location)
    Now when i connect a1989 to other macbook i'm able to restore it via apple configurator (it will finish with padlock in apple configurator)
    but there is nothing on external screen (trackad is responding so T2 is alive) also nothing obvious is getting warm.

    When i try to Revive it's also successfully done (it finish with padlock on apple configurator) but again there is nothing on external screen.

    This macbook was working fine on external screen (as internal is burned common fault on a1989)

    any idea ?

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      #3
      External screen still works?

      Test the voltage to ground of IPD_LID_OPEN.

      Comment

        #4
        external screen was working as there was burned pin under CPU.
        Now there is no output to external screen (i tried restore, revive in DFU mode) also Restore in Recovery mode was finished successfully, but still no output to external screen.
        Also Capslock is not green if i press it, nothing on touch bar, only trackpad response.

        In apple controller if i try right click on pad lock / quick look it shows booted but storrage it still Loading. (but i guess this shouldn't be problem as if there will be any problem with SSD chips restore, revive will not finish)

        IPD_LID_OPEN - 1.8V power connected (battery connected, tested on J6701 (trackapd connector) - pin 1
        Attached Files
        Last edited by obelix24; 05-12-2025, 05:58 AM.

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          #5
          Is it not possible that the macbook is in recovery screen and as it's touch bar i don't know how to switch screen to external (shortcut CMD + F1 is not possible here as touch bar haven't lid up during this first screen)
          i tried to connect windows USB keyboard but i don't know the combination to switch screen.

          does anyone know how to switch screen on touch bar macbook without internal screen.

          Comment

            #6
            Any idea how can i test this ?

            Comment

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