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  1. brunomotter

    820-00840 Strange USB Problem

    Did it… same
  2. brunomotter

    820-00840 Strange USB Problem

    Tried.. Same thing.
  3. brunomotter

    820-00840 Strange USB Problem

    Yep, same in safe mode
  4. brunomotter

    820-00840 Strange USB Problem

    Drives don't disappear on EFI even leaving it connected.
  5. brunomotter

    820-00840 Strange USB Problem

    I’ll leave it connected on EFI tomorrow. Problem after os is loaded happens with ISB 2, 3 and hdmi
  6. brunomotter

    820-00840 Strange USB Problem

    Just replaced it, same thing! Also replaced U2890, which is the BIOS chip for TBT
  7. brunomotter

    820-00840 Strange USB Problem

    What chip is that? Yes, I get power on USB, but no communication nor HDMI signal.
  8. brunomotter

    820-00840 Strange USB Problem

    Hello. This board came to me with no life. Shorted 3V3 line. Corrected that problem and the board started. Everything works fine except for USB/Thunderbolt/HDMI. I have a Satechi USB-C hub here which I use on all my personal Macs and use it to test all costumer's Mac, So I know it's working...
  9. brunomotter

    820-01521 Weird Video Loss Problem

    Yes, I agree it's not a driver issue because I formatted and installed new fresh OS and problem persists. But, what I meant is that it's only after all drivers load that the problem starts, telling me it's an issue when it requires more from the graphics side... I'll try to get a test display...
  10. brunomotter

    820-01521 Weird Video Loss Problem

    It goes black with just backlight on, no image. I’ll test that signal tomorrow. I don’t believe it’s a screen problem because the problem only occurs after system completely boots and if video drivers are loaded.
  11. brunomotter

    820-01521 Weird Video Loss Problem

    Hello. Got this one here with a strange problem. Internal video is lost a few seconds after the system loads. Just internal video is gone, backlight keeps on. On external monitor it works ok. If I start in safe mode everything works, except of course graphics drivers are not loaded, but internal...
  12. 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.
  13. 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.
  14. 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.
  15. brunomotter

    820-00165 Partially In S0, Low PP5V_S4S3

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

    820-00165 Partially In S0, Low PP5V_S4S3

    Here's a video showing what's happening:
  17. 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
  18. 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...
  19. 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!
  20. 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.
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