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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.
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.
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
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...
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.
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...
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...
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...
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...
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...
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...