Liquid damaged A1707, touch bar connector damaged, short on PP5V_S0
I have a 2017 Macbook Pro with minor liquid damage to the board. The board has been cleaned, however it appears that the pad for pin 22 on J4402, the Touch Bar connector, has vanished and left a fairly decent sized crater where the via for pin 22 would’ve been. After an exhaustive search I finally managed to identify/locate a suitable connector to use for replacement (if anyone else finds themselves in this situation, the connector can be harvested from an ipad air 1 or ipad air 2, it’s the rear camera connector).
I don’t have any schematics for this, so I’m not sure where I should be running a wire. The only pad that was damaged is pin 22 and the machine appears to be in an S0 state (the fans run but there’s no chime, no display, no caps lock key activation, no usb power out present, etc. I see 18-19 volts on my meter and the machine seems to be steadily puling approximately 2.9 amps. I suppose there isn’t much else to test at this point until address the issue with reconnecting pin 22.
This particular board schematic is not available, however 820-00281-A appears nearly identical to this model. I found a component that is incredibly hot, U8209, and it looks like this is a switch for PP5V_S0. I’m hoping that if I can run a jumper from pin 22 to connect to PP5V_S0 somewhere , I might just be able to make this Macbook boot up again?
Any advice, direction or input is very much appreciated!
I’m going to take some pics so I can upload them to give a better understanding of the situation.
Added some pictures - the mounting hole/bracket thing was already missing when I received the board. I have no idea how it could’ve even been broken off in that spot.
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