a2251 820-01949-a boot looping after screen replacement

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  • Junior††
    Member
    • Aug 2024
    • 18
    • United States

    #1

    a2251 820-01949-a boot looping after screen replacement

    not sure how it happened but after replacing the screen on a2251 macbook it:

    fans turn on for a second or 2, turn off, apple logo shows, 5-10 seconds pass and then system cuts off then cycles

    thermal camera shows these are getting quite hot although i'm not sure what do to.

    i've tried internet restore, same thing, put the old screen back on, same thing. which i'm inclined to think i f'd this up somehow or another. or the part that was given is faulty and caused something to go wrong. but I want to believe it's someone not me, but i'm prepared to think i did something.

    reason being i'm not 100% sure if it was completely off before battery disconnected (i lay the palm rest keyboard and the screen jutting out the side of my desk) so maybe it was in the process of shutting down or booting up?

    i also tried without battery and it gets stuck at apple logo and fans go full speed (the cpu is luke warm, if that) and does not boot loop.

    measured ic's with multimeter compared to the others that are nearby, seem fine, coils measure ~100ohms or so per coil near that ic. not sure how to proceed, other than dfu as a friend suggested, but no mac nearby...

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