[AnndieHomes]

Hello everyone, 
I have the following problem: my iPhone 6 for down, display of course Since I repair all iPhones for friends and acquaintances since the iPhone 4, I also exchanged my sixth display myself. No problem, everything works fine! 
The only problem is that since the ID no longer works. There is no finger to read, under settings he always says: "Configuration of the Touch-ID has failed". 
I have read on the net that the ID Movies series world does not work anymore if you swap the no-button, since the homebutton is bound to the logic board. That's why I used the old button extra. The button works fine too.
Unfortunately, I can not update to iOS 9, he always tells me the update has failed. 

Does anyone have experience with such a case? Should I reset it to factory settings? Although the iPhone does not start because of the missing touch ID and displays the error 53.  

Thanks in advance!

[*Leopard*]

Maybe the flex cable of Touch ID is damaged.