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820-3462 won’t turn on on battery, won’t turn off with charger

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  • 820-3462 won’t turn on on battery, won’t turn off with charger

    MacBook had liquid damage.
    Tested with two 100% working batteries.
    Once OS boot battery is visible, its show % of charge and charger charge battery without any problem.

    WITH BATTERY
    When short SMC_ONOFF_L not no fan spin.
    SMC_ONOFF_L got stable 3.40V when got fan spin.
    R5710 and r5070 got correct resistance.

    When I connect charger got fan spin/chime etc but when short SMC_ONOFF_L then no fan spin but after 1 second it turns on again.
    When I disconnect charger got still fan spin and when will do short on SMC_ONOFF_L is turned off but can turn on with SMC_ONOFF_L.

    CHARGER ONLY
    Fan spin when short SMC_ONOFF_L after a second got fan spin again.


    Any idea?
    Last edited by ajdoc; 04-10-2019, 11:38 AM.

  • #2
    Does it start itself when charger is connected (no battery)?

    Disconnect keyboard and simulate power button with R5115/16 pads.
    Still the same issues?

    On battery only, do you get stable 3V42_G3H?

    Comment


    • #3
      Does it start itself when charger is connected (no battery)?
      Yes

      Disconnect keyboard and simulate power button with R5115/16 pads.
      Still the same issues?
      I was testing without keyboard. Was using pads on keyboard (SMC_ONOFF_L and GND)

      On battery only, do you get stable 3V42_G3H?
      Yes, stable at 3.44V

      Comment

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