Chosen Solution
After an iPhone 5s screen replacement the finger print sensor is not working, I have repair many of these without this problem in the past, and have checked that all internals are connected and in good shape etc. Has any other repairers has this problem? And how did you fix it? I know that they cant be preplaced also. Thanks
The only thing it can be is if the connection is not plugged in or you have damaged the sensor was it a screen replacement you were doing?
Reset all finger print memory. The problem will be solved.