820-01700-A Water damage

[bartech]

water damage near U8640 , one usb wor different so i change UB400 and now i got on all usb 5.23v 0.02A -> 5.23v 0.11A -> 5.20v 0.23A -> 5.20v 0.22A and stay at that 5.20/0.22A
ppbus_g3h - 12.3v

 

[2informaticos]

"i change UB400"
Did you get it from same model donor board and same position?

 

[bartech]

no but i will check if i got one maiboard like that

 

[2informaticos]

No other will work!!!

 

[bartech]

ok i get the chip back now i got on 3 of ubc-c 5,21 v - 20.7v , 0,05A
on usb-c A i have 5,23v . 0A - i think its usb c A near touchbar, usb on right side.
i see that c3500 is lost whit hole on ppbu side .

 

[2informaticos]

Is this the one replaced?
Do you get its LDOs?

 

[bartech]

now i have on three usb 5.23v 0.02A -> 5.22v 0.15A -> 5.19V 0.27A
on U3100 5,23v 0A ( replaced and get back one )
tp_usbc_pp20v_xa is 5.17 on tpc5n3 if i check good because a lot more dots than on brd

 

[2informaticos]

"Do you get its LDOs?"
C3104 & C3108...

 

[bartech]

c3104-1, 58v
c3108-3.44v

 

[2informaticos]

Flipping the cable on this port, doesn't affected meter indication?

 

[bartech]

on usbc its same

 

[2informaticos]

Probably bad/incorrect chip, if U3100 stays with 5V/0A on its port.