Touch ID not working after screen replacement

"Did you replace the ""Full Assembly"" or just the front LCD?

If you replaced the full assembly (and transferred over only your TouchID) you most likely have a faulty TouchID Ribbon Cable that runs behind the LCD Shield Plate. You can swap over your original and it should restore functionality.

If, however, you replaced just the front screen you most likely damaged either your TouchID sensor or your TouchID Ribbon Cable that runs behind the LCD Shield Plate. You can replace the LCD Shield Plate and restore functionality, but you cannot restore functionality by replacing the TouchID sensor without Apple's assistance."

"I had this issue my 1st few times replacing customer's screen.

Method #1: Each time I took the home button from the screen they originally had on the iPhone & swapped it with the new home button. That then fixed the issue each time.

Method #2: For the times there was only 1 home button present, I suggested that they 1st backup their iPhone using a computer. 2ndly do I clean wipe of the iPhone. 3rdly restore the iPhone from backup. Which will replace all of your files & settings back into your phone as they were.

Both of those methods worked every time I ran across that issue. However, if neither of the 2 fixes work for you, then YES. It is indeed a hardware part that has been damaged during the screen replacement & you should order a new piece.

If you get the ""touch ID"" error when installing the new piece it is only due to the old home button being registered to the iPhone's system itself & will be fixed with method #2.

WHEN RESTORING, UPDATING OR FRESHLY INSTALLING IOS ON THE IPHONE, THE PARTS REGISTER TO THE IOS SYSTEM OF THE PHONE. Hope this helps you guys & gals."

You can fix this with iTunes. Do a software repair and it will work again (if the hardware is still oké) I think it happens when the iPhone is not turned off when you open it.

"I had the same problem. After screen replacement it's not working.

I fixed it accidentally though.

So here's what I did:

I installed IOS 11 Beta and within IOS 11 the touch ID was all good. I was very exited to have my touch ID working again. The only problem was- the IOS Beta was not stable and my phone was restarting all the time, so I had to downgrade back to IOS 10.

I was pretty sure that I'm losing the touch ID again.

Now I'm back on latest IOS 10 and The touch ID is working perfectly fine with my after market screen."

You might wanna check if you really peel off the TouchID ribbon cable on the Shield Plate correctly. There's a small piece of plate that attach behind the TouchID ribbon cable and it's important for you to peel off the TouchId ribbon cable with the plate and transfer it to the new LCD.

"I found this answer a while ago so I thought it may be helpful. Please comment if this works for you :)

How to fix Touch ID Not Working Issue on iPhone 6/6 Plus

Step #1. Launch Settings → Scroll down to tap on Touch ID and Passcode. Enter your passcode.

Step #2. Turn OFF iPhone Unlock and iTunes & App Store.

Step #3. Press home button to return to home screen and then restart your iPhone by pressing sleep/wake button and home button.

Step #4. Launch Settings → Scroll down to tap on Touch ID and Passcode. Enter your passcode.

Step #5. Turn ON iPhone Unlock and iTunes & App Store.

Step #6. Tap on Add a Fingerprint… and add another finger as usual.

With the above steps Touch ID will start working properly"