Macbook Air a1466 no keyboard and no touchpad

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  • mon2
    Badcaps Legend
    • Dec 2019
    • 13849
    • Canada
    #21
    Re: Macbook Air a1466 no keyboard and no touchpad

    The STM32 microcontroller is now damaged. Do not attach a fresh trackpad at this time since this trackpad at one time was working and now has a hole in this controller IC.

    There must be a leaky component that is stopping the use of both the adapter and the battery from working together.

    Leave the trackpad off the logic board and review the power path flow using only the adapter / then only the battery and then finally, both together.

    Start with the dual common cathode diode that powers the 3v42 power rail.

    Be sure that diode is not leaking. Check this dual diode in diode mode.

    You should be able to have both power sources be connected without conflict - without the trackpad being attached.

      Comment

      • koby058
        Badcaps Veteran
        • Jan 2017
        • 360
        • israel
        #22
        Re: Macbook Air a1466 no keyboard and no touchpad

        Will do.

        do you mean D7005?
        Attached Files

          Comment

          • mon2
            Badcaps Legend
            • Dec 2019
            • 13849
            • Canada
            #23
            Re: Macbook Air a1466 no keyboard and no touchpad

            Yes.

              Comment

              • koby058
                Badcaps Veteran
                • Jan 2017
                • 360
                • israel
                #24
                Re: Macbook Air a1466 no keyboard and no touchpad

                Hi

                after measuring 3.42 rail with only power, only batt, and both it looks like power is stable.

                I have connected the fresh touchpad and all works good.

                @mon2 Thank you so much for your help and for knowledge and time sharing.

                laptop is back to life

                  Comment

                  • mon2
                    Badcaps Legend
                    • Dec 2019
                    • 13849
                    • Canada
                    #25
                    Re: Macbook Air a1466 no keyboard and no touchpad

                    Good job.

                      Comment

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