Replacement display touchscreen not working in one area

Hello Roberto,

therefore, before installation, the operation of the screen is checked, because Chinese duds are everywhere.

anyway, it doesn't necessarily mean damage. You may have misplaced the touch function connector. Take the screen out of the housing again, unscrew the insulators, disconnect the battery, then the screen straps (x2+x1). Check if something has fallen into the port, which sometimes happens. Insert both screen tapes, battery and check operation. If it's good, disconnect the battery again, plug in the FaceTime sensor strip, plug in the battery, tighten the insulators, insert and latch the screen, tighten the screen screws. The End. However, if the test fails, the screen may have been damaged prior to installation or was damaged during installation. Removing the protective film from the inside of the screen could not damage it - it is a transport and protective film for the time of factory tests against mechanical damage. If you damaged the screen, then look for the touch function connector or tape continuity in the area. Otherwise, if it hasn't been broken, it's unlikely to be damaged.