Missing 5volt on Apple Mac Book Air

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  • Pragmatiko
    Badcaps Veteran
    • Jul 2013
    • 468
    • IT
    #1

    Missing 5volt on Apple Mac Book Air

    No any voltage on L7220.
    On pin 5 of Q7220 8volt are present, on pin4 no voltage. I have replaced Q7220 and Q7225 without success.
    Could be a problem of U7201 ? 3,3V are present
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