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  1. brunomotter

    820-00165 Partially In S0, Low PP5V_S4S3

    Sorry, don't have thermal camera here. But the only thing that gets a little warmer than the rest of the board is the webcam controller region, which is fed by 1.2V and not PP5V. And that's after around 5 to 10 minutes connected to charger.
  2. brunomotter

    820-00165 Partially In S0, Low PP5V_S4S3

    I already did that. Compared to a donor board, component by component, all traces and resistors are fine.
  3. brunomotter

    820-00165 Partially In S0, Low PP5V_S4S3

    R7545 is fine. Replaced C7524 just in case, same thing. PP5V_S5 is stable @5V. I tried lifting every cap related to 5V output that point to GND, but same 3V on PP5V_S4RS3 output but same. Certainly something has leaking voltage on 5V line, but cannot find what it is.
  4. brunomotter

    820-00165 Partially In S0, Low PP5V_S4S3

    My bad. I read PDDR3_S0 instead of PDDR_S3. Will check all those components.
  5. brunomotter

    820-00165 Partially In S0, Low PP5V_S4S3

    Here's a video showing what's happening:
  6. brunomotter

    820-00165 Partially In S0, Low PP5V_S4S3

    I also thought it was not possible to get any S0 voltages without stable 5V on L7520, but that's exactly what's happening. I have 3.05V there and still get stable 1.2V on L7430. Diode mode reading on L7520 is 0.398. R7520/21/23 reading fine and traces ok. Pin 4 of U7501 stable 3.3V
  7. brunomotter

    820-00165 Partially In S0, Low PP5V_S4S3

    Hello. Got this board here with a strange issue. It partially turns on(some S0 state voltages are present). No fan spin. I have DDR voltage stable ate 1.2V, but PP5V_S4 is measuring low, at only 3.05V. Tried replacing TPS51980 and MOSFET, still same. Something is dragging 5V voltage down, some...
  8. brunomotter

    820-3536 Not Charging Battery

    Q7180(which I already replaced before) was bad and preventing PPBUS to get high. Replaced it and now everything is working again. Thanks!
  9. brunomotter

    820-3536 Not Charging Battery

    I confess I didn't check PPBUS_G3H before as machine was turning on. But after you asked I tried turning board on outside the case and it didn't, so I checked PPBUS and it's giving only 1.156V. I have no shorts there, so I replaced U7100 and Q7130, but still same weird voltage on PPBUS.
  10. brunomotter

    820-3536 Not Charging Battery

    Hello. This board came from another store and had been cleaned previously, so I don't know where original damage was. Board was liquid damaged but all traces of liquid had been erased by cleaning. Board turns on, works on battery and on charger, but does not charge battery. Magsafe light comes...
  11. brunomotter

    820-00165 Fan Spins, No POST

    Was what I thought... Any way to confirm it?
  12. brunomotter

    820-00165 Fan Spins, No POST

    PLT_RESET_L - 3.325V R1280 - 1.05V on both pins. Yes, measuring on pin 2 of the mentioned coils
  13. brunomotter

    820-00165 Fan Spins, No POST

    R1540 - 33 ohms R1541 - 33,4 ohms R1542 - 33,2 ohms R1543 - 33 ohms R1544 - 33 ohms L1270/75/90/95 - 1.05V
  14. brunomotter

    820-00165 Fan Spins, No POST

    Hello. Got this board here. Board is completely clean, no corrosion at all. Fan spins, I get 1v05 and 1.8V at CPU VCORE, no chime, no POST. Fan spins at max after some time, CPU gets warm. Tried reballing SMC, no luck, tried new BIOS, no luck, verified all SPI resistors and all read ok. No...
  15. brunomotter

    A1707 Backlight Flex Pinout

    Hello. I'm trying to fix an A1707 display assembly with bad backlight flex cable. I could only find some videos taking about A1708 which apparently is not the same. I peeled off protective varnish from the cable to expose the traces and ran jumpers from them., but the video I found on YouTube...
  16. brunomotter

    820-00923 No Internal Video

    EDP_INT_AUX_N - 0.002 EDP_INT_AUX_P - 0.238 EDP_INT_ML_N<0> - 0.281 EDP_INT_ML_P<0> - 0.279 EDP_INT_ML_N<1> - 0.275 EDP_INT_ML_P<1> - 0.276 EDP_INT_ML_N<2> - 0.276 EDP_INT_ML_P<2> - 0.276 EDP_INT_ML_N<3> - 0.276 EDP_INT_ML_P<3> - 0.276
  17. brunomotter

    820-00928 Critical Software Update Needed

    Hello. Got this board here. It was liquid damaged 2 times about a year ago. I ultrasonic cleaned it and it worked again until about 3 months ago when keyboard died. I ordered an used original top case and installed and machine worked again for 2 months. Yesterday it came back here with this...
  18. brunomotter

    820-01061 BIOS

    I found out that one of the USB-C ports ir shorted on one side. I removed an R0 resistor that goes to power of the CD3215 and discovered the short is from CD3215 side and not port side. As I don't have schematics I cannot proceed on repair because I need to know what components belong to that...
  19. brunomotter

    820-01061 BIOS

    I think I found the culprit of the problem. It's related to USB-C ports. One of the 2 controllers looks burned. I replaced it and the board worked well until I plugged in an external HDD to one of the USB-C ports. Then the machine went crazy again. I took the board off the chassis to inspect and...
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