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  1. J

    820-00164 won't chime after interrupted MacOS update

    Hello guys, I have been reading this forum and watching Louis videos for a long time and now I need some help so I decided to register. A client bringed to me his Macbook air 11" 820-00164 early 2015 board which he turned off in the middle of a system update. I have already checked the board...
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