Chosen Solution

Hi! I pointed out a problem here I dropped the phone and white stripes appeared on the screen? now then, i replaiced the screen, but sensor didn’t start working… People, Help me! Important information is on this iphone ( Thank you!

Turn it on and off again if u didn’t switch off the phone before replacing the screen??? Hold home and power button for 20 seconds or so or unplug the battery and plug it back

Do you mean sensor as in digitizer / touch screen not working? Or is it some other sensor like proximity (screen off when near ear during calls) / ambient light sensor (auto brightness)