iPhone 6 LCD屏幕面板的更换

Did this replacement and the finger scaner stop working. I didnt damge anything im a experienced technician the button still worked but the finger print doest work. I thought the firmware was corrupted and I updated the phone. It now shows an error and can not be restore to normal functionality, its stuck in restore mode . I had to reassemble the phone and set it to pay and paid a fee for a new one.