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5v_s4_T_USBC diode mode is 0.161 5v_s4_X_USBC diode mode is0.174

yeah good capacity, diode mode to ground on pin 1 of c7025 is 0.533v, pin 2 0.121v r7042 : 0 ohm r7015 : 99k ohm r7016 : 3 kohm, all good according to schematic

upc_t_5v_en is same at 0.5v

resistance 17/18 : 3 ohm 27/28 20 ohm diode mode L7030 : 0.466v r7025 is good at 0.1 ohm c7025 is not shorted.

pin 1 is 0v, i look another post is at least 16.5v, and I have changed q7080 before fyi

1 0v 2 16.5v 3 3.9v 6 3.3v 9 0v 12 3.4v 13 2.4v 14 2.9v 15 300mv 17 1v 19 5.4v 20 5.4v 27 1v

i was measuring until pin 21/22.. diode mode is 0.. immediately realized this is shorted.. inject and poof, solved thanks a lot..

this came in, no visible liquid damage, but whole board is dusty ppdcin is 16.5v normal pp3v42 present, but no green /orange light. adapter sense up to pin 2 of j6900 is normal 3.4v, ppbus is 1v resistance between pin 17/18 :4 ohm 27/28 is 20 ohm smc_reset_l is 2.8v at first,after I reball smc...

from what i dechiper, upc_x_5v_en is either comes from u3100 or u3200, so how do I determine which one is the culprit?

UPC_X_5V_EN measured at u3500 is 0.4v R3032 is 100k good

yeah this board is massacred by another technician before..

i actually have a 30 ohm short on pp3v3_s0, but i intend not to bother with it until I have stable green light

but most of time, I either have 0v or low ppdcin.. does smc_reset_l cause low ppdcin ? there's no short on smc_reset_l but i cannot measure thevoltage because i dont even have ppdcin

when I have full ppdcin, ppbus is at 12.26v, yes i did suspect smc, i will give it a light reflow dcin board is known good

r6995 is bad, replaced, now I have pp16v5 at ppdcin, pp3v42 3.42v smc_bc_acok 3.4v adapter_sense is 3.4v up to pin 5 of charging port sometimes i have green light, and then i replug the port, and its gone, and ppdcin_g3h is back at 1.6v,..

wait , it become 0.8v with fake charger at ppdcin_g3h

hi this came in with no backlight problem, I have 0v on ppvout_sw_lcdbklt but no short. 12.6v at bothside of fuse, while probing around, i realize, now if Icd is connected, fan would spin a bit, then stop. ( not turning on ) but if I remove lcd, fan will spin forever..

with fake charger, i get 12.6 at ppdcin_g3h

this came in with various side liquid damaged, i have replaced u7000, q7030 q7035, q7080, but still no ppdcin, even though there's no short.. using fake charger no green light too..

thanks, there's missing traces from the back of board from r7020 to its via nearby.. after i get green light, i still dont have pp5v_s5, replaced u7200 and got pp5v_s5.. after that i replaced 2 resistor for pch_intvrmen and pch_dswvrmen and i its turned on now..thanks a lot,,