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    820-00165-A Powers Up, No Chime no Display

    Check L8304 for high resistance or damage; I have had quite a few with an issue here in one wholesale batch or repairs i did.
  2. T

    820-00164-b

    Sorry wrong post!
  3. T

    820-00164-b

    Inspect L8304 for high resistance or damage.
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    Bios locked lot of 12.....

    I could not find any consistent reliable information about the subject on line so I ended up comparing a locked bios to an unlocked one and found the password region. After 3 attempts I cleaned the first one sucsessfully after backing it up thoroughly. Then proceeded to hotair and flash all...
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    Bios locked lot of 12.....

    Thanks for the reply 2informaticos, Yes I know vaguely of the medusa device, and I have done many MacBooks and am quite experienced in it, though I have never done bios lock removal in the past because of the shady characters that generally request it. I have toe gear to flash the chips and...
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    Bios locked lot of 12.....

    Hi there all, I am new to this forum, so I will introduce my self briefly; My name is Shannon and I?m an Australian repair bloke from NSW. This is my conundrum; I knowingly bought 12x 2015 13? MacBook Airs at an auction for a good price from a corporate liquidation, but they all have Bios...
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