Macbook Air A2179 - Mobo 820-01958 stuck at 15.2V

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  • eastcoastcomputing
    Senior Member
    • Feb 2023
    • 58
    • UK
    #1

    Macbook Air A2179 - Mobo 820-01958 stuck at 15.2V

    Hi there,

    I've got this case that puzzles me and I couldn't find any similar case to explain it. Maybe you guys can help?

    The computer went to black screen while being used and fan started to rev full speed. It had to be forced shut down. Since then, fires up but no display, no chime and not in DFU.

    I took the board out and inspected it with microscope: no visible damage to chips, no liquid damage. I checked all coils: no short.

    The board goes to 3.5V, then 5V, then gets stuck at 15.2V.

    L7030, L7400 and CPU (with its cooler on) go up to 65 Celsius within 20 seconds (according to thermal cam)...

    Am I looking at a dead CPU?
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