Chosen Solution
I replaced the screen on my iPhone 6 with a nice iFixit part and now Touch ID will not work. When I am in Touch ID settings and turn it on (it was in the off position after the repair) I get an error screen. I have done this repair before to the same phone with no issues. After reading many posts on this, I have quadruple checked the connections and inspected for damage. All is good. I have done hard resets, restored from iTunes, and even lit a candle for Steve Jobs… no dice. Everything else is good though. Any suggestions are very welcome! Thanks in advance.
If you put back the original Touch ID then you could have damaged: The home button flex cable itself, or it’s connector. The home button interconnect cable that runs on the back of the plate. Or a board component: the board connector or a filter or resistor on the Touch ID circuit. Start examining all the above using good magnification. You ought to find it.
