Chosen Solution
I replaced the screen on my iphone 7 plus and now the touch ID will not work. I have read that you need to have the origional home button which I have installed and still not working. I have also read that the board may reject the new digitizer. Is there anything I can do without taking it to the manufacturer to get this touch ID to work?
Does your old screen still function? If so, put the home button back on the broken screen to see if it still works. If it doesnt not, then it was damaged somehow during the repair. If it does work, then most likely you have a bad replacement part. I have had this happen before where the screen works perfect, but the touch id does not.
