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  1. R

    820 00850 Working on Charger only

    Ampere on PSU is fluctuating ..range from 0.350 to0.750 Not working on Battery, While charger is connected Battery shows 40 percent, and charging and when I take the charger plug out MacBook turns off Corrosion on Q7040
  2. R

    820-4924A Backlight Issue

    Did you change LCD connector? Yes BKLT_EN_R : Not Present D7710 :No Voltage F7700 : 12.6 .. Working FIne
  3. R

    820-4924A Backlight Issue

    There was a corrosion on LCD pins there is an Image on LCD but no Backlight Can you help me troubleshoot this mother board?
  4. R

    820-00165 A, Image with No Backlight Issue

    That was just a blown fuse F7700, Thanks for your help
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    820-00165 A, Image with No Backlight Issue

    I am sorry , i am a bit Dumb. Can you tell me how to " check XW7720 integrity "? There is nothing shorted in that Area, I am not sure why fuse blown out
  6. R

    820-00165 A, Image with No Backlight Issue

    Please help me troubleshoot the problem F7700 has been Damaged
  7. R

    820 00165 A ..... PM_SLP_S5_L missing

    PM_SLP_S5_L was pulling down the voltage on U8170 I had to replace one RTC resistor, Laptop started working Thanks for your help
  8. R

    820-01987 A ...... PPBUS_G3H Short

    Short Removed Now It is talking 0.60 mA ============================= F 7000 = 12.35 L 7030 = 5V WHat should be the best step?
  9. R

    820 00165 A ..... PM_SLP_S5_L missing

    Max Current : 0.30 mA C8170: pin 1= 3.3 V U8170: pin 6= 0V Help me out sir
  10. R

    820-01987 A ...... PPBUS_G3H Short

    No Same voltage on any other Coil, Not even on L9080or L9081
  11. R

    820-01987 A ...... PPBUS_G3H Short

    Help me remove the shorting from the board No signs of Physical Damage or Liquid Damage No history and Board looks clean under the microscope Input Voltage : 5 V F 7000 Pin 2 : 0.50 V & 54 ohm RTG
  12. R

    820 02020 A Not Turning ON

    Can you help me find the board view? Current State Voltage : 5 V Current : 100 mA
  13. R

    820-2914 board , I am missing LCD BKLT EN, It comes from GMUX U9600

    I am not sure how to disable GPU ? The board came from another shop and they already have a jumper for LCD_BKLT_PWM
  14. R

    820-2914 board , I am missing LCD BKLT EN, It comes from GMUX U9600

    Could someone help me with what to do next? I am working on 820-2914 board. It’s a MacBook Pro 17” I have display as confirmed bu chipmunk USB tester. I am missing LCD BKLT EN. It comes from GMUX U9600 If it’s not present, anything I can do?
  15. R

    820 000165 ALL_SYS_PWRGD Missing

    When I took off R8168 , R7450 dropped from 1.08 to 0.65V R8168 still out of board After Changing U7400 R7450 = 0.48V
  16. R

    820 000165 ALL_SYS_PWRGD Missing

    Q8150 Soldered Back , R8168 still out of board ======================== R7450 = 0.65 V L7310/20 = 1.8 V
  17. R

    820 000165 ALL_SYS_PWRGD Missing

    I cannot see any corrosion or anything physical near U7400. Should I start with disconnecting coil or replacing u7400? and Should I put Q8150 back to its place now?
  18. R

    820 000165 ALL_SYS_PWRGD Missing

    Removed R8168 & Q8150 R8166 Pin 1 = 3.3 V Pin 2 = 3.3 0V R8165 Pin 1 = 3.3 V Pin 2 = 3.3 0V R8164 Pin 1 = 3.3 V Pin 2 = 3.3 0V R8167 PIN 1 : 3.3 V & Pin 2= 3.3V
  19. R

    820 000165 ALL_SYS_PWRGD Missing

    Removed Q8150 R8166 Pin 1 = 0.60V Pin 2 =0.60V R8165 Pin 1 = 0.60V Pin 2 =0.60V R8164 Pin 1= 0.60V Pin 2 = 0.60V R8168 Pin 1= 0.28V Pin 2 = 0.60V L7130 =8.6V L7520 = 5.0V L7560 = 3.3V L7430 = 1.08V L7630 = 1.05V L7310 =0V L7320 = 0V
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