820-00923-A, known good tp/kb ribbon, not working.

[daxxone]

Board had slight bend, replaced pretty much everything, but the board never seems to work with built in tp/kb. Bought a macbook pro to test and the parts I got are good on the test system. the tp feedback still works, not that it matters with this design, but 3.3v and 5v are also present. Afraid this is a bad solider joint somewhere on the I2C SCL/SDA lines but am open to looking at other things. What would you look at first to narrow down the source cause here? I don't know how to test these signal lines.

 

[2informaticos]

Any more information about how the problem appeared?

I suppose your problem is trackpad related.
KB can't work also, if TP is not working.

Check all TPAD_SPI resistors and traces.

 

[daxxone]

Any more information about how the problem appeared?

Body bent, not much but enough.
Looking at R4513 first, and it was missing. Pretty sure this is now solved. Will verify by end of the day, just for a few things to do first.