After I replaced my top screen of my DSL with a new one. And I finished up and turned it back on, sound was working, touch screen was working. Bottem screen was working, all buttons were working, microphone/speakers were working BUT! Geuss what, my top screen is all white. Why? How are the speakers (which are attached to the ribbon cable of the top screen) working and the top screen itself only showing a white screen? What could be the problem? Faulty screen? Or the connection between the top and the motherboard?