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  1. R

    820 000165 ALL_SYS_PWRGD Missing

    My bad , it was Voltage not Ampere ALL_SYS_PWRGD : 0.60 V ================================= PM_SLP_S3_L Present R8167 Pin 1 = 3.3V Pin 2= 0.6 V
  2. R

    820 000165 ALL_SYS_PWRGD Missing

    Board is taking 0.160 mA ALL_SYS_PWRGD : 0.60 mA ===================================== How would I know if its Q8150 or U1950? I want to know how to approach this issue ? I don't want to use hit and trail method I appreciate all your help Sir
  3. R

    820 01521 : Unable to erase the MacBook air

    How to do it ? Try to put the machine in Target Disk mode and access its SSD from other Mac. I got another macbook pro 2018 with the same issue
  4. R

    820 3115B.... NO Image on LCD

    Sorry, My bad... I ment pins on LCD cable looks damage, and unfortunately, I dont have any other LCD to test
  5. R

    820 3115B.... NO Image on LCD

    I can see a little carbon on both pins of LCD where LVDS_CONN_A_CLK_F_N / LVDS_CONN_A_CLK_F_P connected Voltage on L9080 : 1.21 on Pin 1 and 1.24 on Pin 2 is there any way to clean the LCD connector?
  6. R

    820 3115B.... NO Image on LCD

    when I plug the power supply, it chimes and there is a light on the screen , but no logo or anything. I'd appreciate your help
  7. R

    820 01521 : Unable to erase the MacBook air

    When I click on it....It restarts and launch the internet recovery mode, and then It circle back to same Recovery Assistant page
  8. R

    820 01521 : Unable to erase the MacBook air

    Yes,Using Port that is close to trackpad
  9. R

    820 01521 : Unable to erase the MacBook air

    First of all , I wanna say Thank you so much, I really appreciate it and now I wanna say that I Tried from that port ,which is close to trackpad, as well. It is not going into DFU Mode.
  10. R

    820 01521 : Unable to erase the MacBook air

    It is not getting connected in DFU mode as I mentioned Port 1, which is close to LCD is taking 20 V but not taking ampere, not booting system
  11. R

    820 01521 : Unable to erase the MacBook air

    After multiple attempts Every time I click on erase , it is loading back asking for user id password or Iclould. I don't have either. First Type C port: It takes 20 V in but doesn't boot up Second Type C port : It works fine
  12. R

    820 00840A .....Stuck at 5V

    it is fluctuating between 10 mΩ and 34 mΩ. No single value
  13. R

    820 00840A .....Stuck at 5V

    No History available How to measure the resistance between two resistors ? Should I measure from nearby testing points OR from Pin 1 of R7020 to Pin 1 R7060? It is difficult to take reading from R7020 to R7060 as pins are under the chip
  14. R

    820 00840A .....Stuck at 5V

    Stuck at 5 V 0.30 mA PPBUS_G3H = 4.4V Diode Reading of all LDOs are present U3200 PP3V3_UPC_XB_LDO =Present 0.485 PP1V8_UPC_XB_LDOA =Present 0.502 PP1V8_UPC_XB_LDOD =Present 0.465 PP1V1_UPC_XB_LDO_BMC...
  15. R

    820 00165A .... 5v Missing

    Pulsing (35 mA to 140 mA) I removed all the R8166 R8165 R8164 R8168 , one by one and all at one time...... No difference ...it is still pulsing... After Removing R8167 it become stable at 130 mA I tested this 5 Times.... these readings are final and tested
  16. R

    820 00165A .... 5v Missing

    Removing R8164 L7130 =8.6V L7520 = 0v L7560 = 3.3 V L7430 = 0v L7630 = 0V L7320 =0V L7310 =0V Removing R8168 L7130 =8.6V L7520 = 0v L7560 = 3.3 V L7430 = 0v L7630 = 0V L7320 =0V L7310 =0V Removing 8166 128 mA L7130 =8.6V L7520 = 5.1v L7560 = 3.3 V L7430 = 1.2v L7630 = 1.05V L7320 =0V L7310...
  17. R

    820 00165A .... 5v Missing

    Voltage is stable on all the coils Current : 140 mA L7130 =8.6V L7520 = 5.1 V L7560 = 3.3 V L7430 = 1.2V L7630 = 1.05V L7320 =1.6V L7310 =1.6V But it is going in original state sometimes when I plug out and plug it back in to DC supply
  18. R

    820 00165A .... 5v Missing

    SMC_ONOFF_L : It shorted together for a millisecond Anyways..... I removed Q8150 and still the same situation No stable voltage any other big coils Only stable voltage on L7130 and L7560
  19. R

    820 00165A .... 5v Missing

    No corrosion detected near Q8150 and U1950 areas Before trigger SMC_ON_OFF_L U1950 pins 1: Pulsing Pin 3: Pulsing Pin 7: Pulsing After trigger SMC_ON_OFF_L U1950 pins 1: Pulsing Pin 3: Pulsing Pin 7: Pulsing
  20. R

    820 00165A .... 5v Missing

    Sir, One end of the coil is connected to the board and other end(PIN 2) is in the air. Please ask your questions ,I will not touch it unless you ask me to do
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