MacBook Pro 15" 2011 - fan spin but then shuts off

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  • Gigabit2
    Badcaps Veteran
    • Apr 2022
    • 264
    • United Kingdom
    #1

    MacBook Pro 15" 2011 - fan spin but then shuts off

    Hi all,

    I have a MacBook Pro 15" 2011 with an 820-2915-B board.

    The laptop accepts power from a charger, shows a green light and the fan spins and then the machine immediately shuts off. This process then repeats over and over.

    Can anyone help me in diagnosing this?

    PPBUS_G3H showing 12.58V before and during temporary fan spin.

    PP3V5 showing 3.35V before and during temporary fan spin.

    PP5V5 showing 5.02V before and during temporary fan spin.

    PP5V_S3 0V before fan spin and then 4.3V when fans spin, then back to 0V again.
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