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  1. 2informaticos

    820-00928, 20V 0a

    Exact ohm resistance over C7023?
  2. 2informaticos

    A1398 820-3332-A no power

    Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L. If detected, check for pulse at PM_SLP_S4_L, at same time.
  3. 2informaticos

    A1398 820-3332-A no power

    Any history available? Do you get 3V3_SUS? Be aware, this board requires 85W charger to turn on, without battery.
  4. 2informaticos

    820-01700 5A 0A water damage.

    Do you get 3.3V at pin 2/R7900? If yes, then bad PMU, or broken trace/solder.
  5. 2informaticos

    MacBook Pro A1707

    You may have a graphics problem, on iGPU side. When external monitor is connected, discrete GPU is enabled.
  6. 2informaticos

    820-2828 not turning on time to time (iMac 27" A1312 2011)

    If S5 LED goes off, after pressing power button, change Q8110. If still the same issue, change U7700 too.
  7. 2informaticos

    820-01521-A, 5v 100ma

    3.2V where? Did you try DFU?
  8. 2informaticos

    MacBook Pro A1707

    Has the same behavior with external monitor on both left/right ports? What happens if you click restart, instead of shut down?
  9. 2informaticos

    820-01700 5A 0A water damage.

    Check U7800 LDOs. Be sure R7900 is good.
  10. 2informaticos

    820-01700 5A 0A water damage.

    What did you find bad on 3V3_G3H_RTC? Check AWAKE and SLPS2R voltages.
  11. 2informaticos

    820-01521 Weird Video Loss Problem

    GPU is embedded into CPU and iGPU core works good, if you get correct external video. The problem appears only with internal eDP output, shouldn't be driver issue.
  12. 2informaticos

    820-02020 5V ticking and power cycle

    If diode mode readings at LDOs and U7800 coils are good, then need to change the PMU.
  13. 2informaticos

    820-00928, 20V 0a

    You couldn't get 20V on USB-C input, without 3V3_G3H (L6900); unless use a fake charger.
  14. 2informaticos

    820-01521 Weird Video Loss Problem

    Internal LCD goes white, or black? Both 3V3/5V_S0SW_LCD are stable? You should test with known good screen...
  15. 2informaticos

    820-02020 5V ticking and power cycle

    Do you get U8100 LDO voltages?
  16. 2informaticos

    820-00165 not turn on orange light

    Still problems on U7501 area. Change the chip...
  17. 2informaticos

    820-4924 restarts with battery connected

    Then I suspect CPU issue. When battery is detected, CPU working regime changes and crashes.
  18. 2informaticos

    820-00165 not turn on orange light

    Diode mode to ground at L7560?
  19. 2informaticos

    820-00928, 20V 0a

    Post 3V3_G3H (L6900) and R7020 voltage.
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