having trouble starting up

Discussion in 'MacBook Air' started by mauricev, Aug 6, 2019.

  1. mauricev macrumors newbie

    Joined:
    Oct 10, 2002
    Location:
    Earth
    #1
    MacBook Air early 2015 given me to check out. With the keyboard power button, boots every once in a while. When booted, the keyboard is dead, not even capslock.

    One thing I noticed is that with the battery disconnected and I press the power button, the light goes green for a moment then reverts to amber, but it only rarely boots.

    I tried shorting the power pads and nothing, but here's the real weirdness, when the laptop is opened up upside down, it will periodically bong as if it's about to boot, but rarely does.

    Could this be liquid damage? Aren't there detectors for that? How to know if they've been tripped?

    It's not clear if is damage to the i/o board or to the logic board or both.
     
  2. Audit13 macrumors 601

    Audit13

    Joined:
    Apr 19, 2017
    Location:
    Toronto, Ontario, Canada
    #2
    There could be an issue with the and/or power button causing a short.

    Try this: disconnect the battery, disconnect the trackpad from the logic board, connect the charger, don't touch the MacBook. See if it boots on its own in about 30 seconds.
     
  3. mauricev thread starter macrumors newbie

    Joined:
    Oct 10, 2002
    Location:
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    #3
    Why do you specifically suggest disconnecting the trackpad?
     
  4. Audit13 macrumors 601

    Audit13

    Joined:
    Apr 19, 2017
    Location:
    Toronto, Ontario, Canada
    #4
    The power button and keyboard circuitry are routed through the trackpad to the logic board.
     
  5. mauricev thread starter macrumors newbie

    Joined:
    Oct 10, 2002
    Location:
    Earth
    #5
  6. Audit13 macrumors 601

    Audit13

    Joined:
    Apr 19, 2017
    Location:
    Toronto, Ontario, Canada
    #6
    You don't need the entire to case, you can purchase a set of screws, keyboard, and backlight.
     

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5 August 6, 2019