"How to fix ipad 4 wifi digitizer problems"に関する回答I have done 3 of these, just follow the instructions; Pre-read instructions first. Make sure you understand them fully. Take your time, heat the warmer often and WEAR SAFETY GOGGLES: glass flies everywhere when it cracks. Before removing any of the protective plastic coverings (inside and out) and the adhesive backing pre-test. As an Apple Tech - the white lines on the digitizer should not be visible when fully inserted into the connector. Place the LCD in-place with screws, then gently place the digitizer on top of it. Turn it on and make sure all corners, center bottom, etc works properly. test cameras, microphone and speakers, and Wifi, buttons, volumes, etc.