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  1. #31
    macbook air a1466 stuck on loading bar, can hear sounds.. but wont boot

    Member Since
    Apr 24, 2009
    Location
    UK
    Posts
    765
    Your Mac's Specs
    Various Mac's
    Rep Power
    13
    I usually disconnect circuitry that isn't essential to the MBA booting up, then attempt to boot from a known good external USB device. Disconnect the camera connector, AP/BT card and SSD. The I/O board and cable wouldn't cause your problem, so no need to swop out. If not booting from an external boot device the logic board has likely failed. It's expensive if fitted by an ARS or AASP. I replace quite a few, most are simply dead though, not with your symptoms.
    Steve
    UK

  2. #32
    ok will try that thanks

  3. #33
    ok tried that same issue, tried even putting back the original efi chip still same exact issue. im stumped unless the original.efi and replacement are bad?

  4. #34
    macbook air a1466 stuck on loading bar, can hear sounds.. but wont boot
    MacInWin's Avatar
    Member Since
    Jan 01, 2009
    Location
    Winchester, VA
    Posts
    6,355
    Your Mac's Specs
    MBP 15" Mid 2015, iPhone XS, an iMac, plus ATVs, AWatch, MacMini
    Rep Power
    26
    tried even putting back the original efi chip still same exact issue. im stumped unless the original.efi and replacement are bad?
    OK, that's new news. You've never mentioned you swapped out chips. Anything else you are hiding from us?
    Jake

  5. #35
    ha ha lol no just that, but i today i put back the original efi chip and still same issue im stumped guys

  6. #36
    thats it no one can help me anymore? ok thanks guys

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