A2681 Keyboard, trackpad and sleep?!

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  • iMuhtaseb
    Senior Member
    • Jan 2017
    • 122
    • Palesine
    #1

    A2681 Keyboard, trackpad and sleep?!

    Wow it's been a while since I posted!

    This is a weird case, it has a history of liquid spill a year ago but customer did not want to replace neither trackpad or keyboard.. fast forward for today:

    A2681 turns on but not trackpad or keyboard feedback (or external keyboard and mouse) and then after a minute or so the Mac sleeps..

    It's a NOT a sleep sensor or trackpad or keyboard or daughterboard or anything else (I replaced all those); it's the logic board..

    Tested another locked logic board on customer's top case and it posted with keyboard and trackpad functioning..

    Anybody experienced such issue with the logic board?
    ​
    No signs of liquid on board, so signs of blown caps or resistors or chips.. everything seems intact..

    PPBUS_AONSW_IPD_F diode reading ok
    PP5V_S2_KBDLED_F diode reading ok
    PP1V8_AON_IPD_F diode reading ok
    PP1V2_S2_IPD_F diode reading ok
    PP1V25_AWAKE_IO_F diode reading ok
    PP1V8_S2_IPD_F diode reading ok
    PP3V3_AON_IPD_F diode reading ok
    PP1V8_AWAKE_F diode reading ok
    PP3V8_AON_IPD_F diode reading ok

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