Hello, on this 820-00165 PP3V42 is 1,394V. Resistance to GND is 0,309V. SMC_BC_ACOK is 1,38V and resistance to GND is 0,465. I checked U7000 area, because the two signals show up there together. R7101 has 5V on both sides, CHGR_ACIN is 4,3V, CHGR_DCIN is 16,6V so everything looks fine here for me. Pins 2 (PP3V42) and 4 of J6100 look a little burned (just a little black touch, but visible). Also U6100 Pin 1-4 look a little bad. (as if there is nearly no solder on them compared to Pins 5-8) but maybe thats just my eyes tricking me. The machine was used in a "slightly wet" environment (tropic climate), but no evidence of water. his is one of the cleanest machines/ boards i´ve ever seen.