Nicou posted earlier that it might be an issue with the pins. That would make me think it’s a grounding issue where the pins contact the copper strips on the back side of the motherboard. I’ll try bending them out and cleaning the copper when I open it up again. I did find a rear camera on Amazon for the P20 and hopefully will have it by Friday.
I just did an iPad Air 2 screen replacement and used the original home button assembly. When I booted the device it gave me a message that Touch ID is not functional. The button works otherwise? Is there something I need to do to reset it? Thanks