Answer to: Proximity Sensor heating up, not working, tried new assembly.i had the exact same thing happen to me. It is the screen itself. Its seems to be that the replacement screen lets too much light in compared to the oem screen, most likely due to the plastic surrounds around that area. I replaced the screen again for a new after market screen and it worked perfect. has only happened once!
Answer to: iPhone 7 screen has a white dot. A place on the display is very brightThis is pressure between the screen and the inside of the iPhone. Try another screen - check all screws are in correct place and tightened (not too tight) also try removing the metal back plate and reinstalling.