"iPhone 6S Proximity Sensor not working after screen replacement"に関する回答I have tried different suppliers screen and come to conclusion that this is due to faulty screen as iPhone 6s now use additional circuits just on screen to regulate .
"iPhone 5s - Infinite boot loop (after screen replacement)"に関する回答This may help . Always turn the iPhone 5s off before plug and unplug screen . If you want to test the screen before install it , plug the home button flex before switching it on . If your iPhone behave abnormal , unplug the battery connector and reconnect then switch the phone on . Good luck . Some iPhone 5s screen manufactured cause iPhone screen to go blank so make sure the second screen is not from the same manufacturer usually identified by the stamp it sticker with initials . Sam mpr-oxon.co.uk