Chosen Solution
Replaced a broken (but functional) screen with a replacement screen. Followed all the steps and everything was fine. When I powered on the phone I realized the backlight comes on but the screen does not display anything. I have tried a Hard Reset as well and still nothing?
Are you sure that you disconnected the battery before you unplugged/removed the screen? Usually when an iPhone doesn’t display anything but a white screen that means the screen was removed without disconnecting the battery first.
