Chosen Solution
I’ve been searching page upon page of information relative to this issue but all i seem to find is home button flex issues this is not my issue. I had a charging issue related to tristar that worked great now charges fine but at 0.5A which is not ideal but testing with a new port brings that into normal range of 0.9A-1.0A However after i did this work i now have a non functioning home button (tested several different screens and buttons) Tried a hard reset and still not functioning. I have opened boardview and if i am not wrong J4100 is responsible for the home button on PP3V0_MESA_CONN? I may have this wrong as mentioned i have come up blank on what circuit is responsible for the home button functionality. Any guidance here would be vastly appreciated as before i replaced tristar the home button functioned as intended. I did knock L4522, L4521 around a little but replaced them. Anything else in that region that may be the culprit for my error? Thanks.
Solved - Sadly a tear in the flex near the connector of the screen for the home button is torn. I had not noticed this before but after double checking under the microscope there it was. And it is right on the bend of the flex so a repair is probably out of the question to get Touch ID back. Be careful with these flexes they tear super easy i don’t even know how i did this since i was extremely careful and have done quite a few with no issues.
