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I think you have two separate issues here. First fix the system side current sensing because 5 ohms is a bit high, and that should hopefully fix the issue with the charger light turning off. Then post the voltage on PPBUS_G3H and on either side of R5380/1.
You can't measure resistance when there is power in a circuit, that's how you blow a multimeter up. Read the sticky first: https://www.rossmanngroup.com/boards...71-forum-rules
Determine if PP3V42_G3H is present on U6901.
I actually just had a 3437 that was failing all the temperature sensors like that too, and it ended up just being the trackpad flex that was causing all the sensors to fail. I suspect it was causing those SMC data lines to be pulled low.
Cool story bro.
If you have GPUVCORE_EN, then remove L9330 and L9360 and then inject 1v onto PPVCORE_S0_GFX_REG with a power supply and see if it works, if not then fucked.