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Macbook A1502 2015 - 820-4924-a

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    Macbook A1502 2015 - 820-4924-a

    Hi

    I've a 820-4924-a motherboard with a random black screen (no display problem).
    To solve the problem quickly, i've used another motherboard good same part number. with this board the computer work, but don work the hard disk. So i've replaced the bios. Now boot motherboard work but don't see the hard disk.
    I've tried to use a new bios, but same problem. The hard disk working fine in another computer, but don't boot from the two motherboard where i've swapped the bios. I've tried to replace the bios on the original board without success.

    Any idea?

    Thanks

    Luca

    #2
    Re: Macbook A1502 2015 - 820-4924-a

    The partition is probably formatted as APFS so the board needs at least High Sierra firmware update. Put back the original EFI (otherwise you'll have issues with ME region) and reinstall High Sierra or newer on the internal SSD, it will install the firmware update automatically.
    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

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