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  1. Atomrepair

    820-00165 - backlight working partially

    Weird.. I guess I did mess up the soldering then, nothing else I can think of.
  2. Atomrepair

    820-00165 - backlight working partially

    I fixed the board by taking a U7701 from a donor board and using that. I can think of two reasons for my previous replacements not working; 1. bad soldering 2. bad IC's. I think my soldering was fine; checked all sides under the microscope and could see no dodgy stuff. Also, my three...
  3. Atomrepair

    820-00239 - 5.17V 0.07A after coke spill in charge port

    Board is fixed - CB300 was shorted to ground.
  4. Atomrepair

    820-00165 - backlight working partially

    I have now; area just above D7701 and the test point above it are perfectly clean, no corrosion. measuring 0 Ohms from test point to D7701 and also from test point to pad 5 from U7701
  5. Atomrepair

    820-00239 - 5.17V 0.07A after coke spill in charge port

    PP3V3_G3H_REG_R is shorted to GND. No more time, will follow up on this tomorrow. Thanks for the guidance!
  6. Atomrepair

    820-00239 - 5.17V 0.07A after coke spill in charge port

    TBA_AUX_DET 1,27V TBA_VDDA 5,13V TBA_VDDP 5,13V PPVIN_G3H_P3V3G3H 4,81V PM_EN_P3V3_G3H 5,12V
  7. Atomrepair

    820-00165 - backlight working partially

    update: I measured continuity from all 6 LED_RETURN resistors to the corresponding balls on U7701. Had to fix the board upright and use a very small probe point, but I got what I wanted to know. Backlight stopped working. I replaced U7701 (again) and it worked, but again with the same dark...
  8. Atomrepair

    820-00165 - backlight working partially

    Resistors are all measuring as 0-2 Ohms, connections from resistors to J8300 are fine. I've replaced J8300; still have the same problem. You mentioned I have bad voltage on two lines; which ones? I dont know what normal readings are for these rails and have no comparison (except older pro's...
  9. Atomrepair

    820-00165 - backlight working partially

    This board came in with only slight corrosion on U7701 and no backlight. I replaced U7701 and got backlight back, but not completely. On the left half of the screen only half of the leds are on, resulting in a row of dark spots. I tried different screens first, but they show the same pattern...
  10. Atomrepair

    820-00239 - 5.17V 0.07A after coke spill in charge port

    According to customer, a tiny bit of coke was spilled into a charge port. I can't find any corrosion on the board or on the ports themselves...
  11. Atomrepair

    820-00045 - 20V, 0 Amps - waste of time?

    No time to spend, or desire to deal with warranty when the CPU dies. Thanks for the advice, this is a no-fix.
  12. Atomrepair

    820-00045 - 20V, 0 Amps - waste of time?

    PPBUS is 8.6V PP3V3R3V0_AON 3.26V battery LED is on PP3V3_S5, PP3V3_S5_EN and P5VS4_PHASE are all constantly jumping around, cant get a proper measurement but they're certainly not ok. CPUvcore is at 0V and not cycling. Should I pack this thing back up or is there anything to check out?
  13. Atomrepair

    820-01041 - stuck at 5V

    Nope, didn't do anything special to the non functional or the connected macbook I used to update the firmware. I used a USB-C to USB-C cable that came with an (original) charger.
  14. Atomrepair

    820-01041 - stuck at 5V

    Update on this one: the firmware update fixed the problem. Had to do it a couple of times and got an error about the thunderbolt cable, but it worked in the end. Laptop is booting and functioning fine now.
  15. Atomrepair

    820-01041 - stuck at 5V

    Will try, dont have a working usb-c mac so have to find some way to connect usb-c to usb-a
  16. Atomrepair

    820-01041 - stuck at 5V

    U7800 SYM 1 of 4: PP3V3_G3H_SOCPMU = 3.37V PP1V1_SLPS2R = 1.1V PP3V3_G3H_RTC_X = 3.37V PP0V8_SLPS2R = 0.8V PP3V0_G3H_RTC = 3.0V PP1V2_AWAKE = 1.2V CPU_C10_GATE_L = 0V PP1V05_S0SW = 0V LDO_RTC = 1.5V PP3V3_G3H_SOCPMU = 3.37V PP3V3_AWAKE = 3.37V PP3V3_S5 = 0V
  17. Atomrepair

    820-01041 - stuck at 5V

    23 = 12.3v 12 = 0v 13 = 0v 22 = 3.3v 29 = 0v 21 = 0v
  18. Atomrepair

    820-01041 - stuck at 5V

    PMU_ONOFF_L is 3.37V PM_RSMRST_L and PM_PWRBTN_L are both 0V with a 100mV pulse (over 0.2 seconds) when connecting adapter. U4760 PP3V3_S5 = 0V PP1V8_SLP2SR = 1.8V SMC_SYSRST_L = 0V SMC_PCH_SYS_PWROK = 0V SMC_PCH_PWROK = 0V SMC_RSMRST_L = 0V
  19. Atomrepair

    820-01041 - stuck at 5V

    Yup, getting 12.3V at F7000
  20. Atomrepair

    820-01041 - stuck at 5V

    U6940 1 PP3V3_G3H_RTC_X = 3.3V 3 PMU_ONOFF_L = 3.3V 4 PMU_RSLOC_RST_L = 3.3V 10 CHGR_RST_OM_R = 0V (no short to gnd)
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