Answer to: Replaced battery, phone turns on, screen doesn't?I know its a long shot, but there is a protective film on the _inside_ of the screen. I forgot to remove it from my I pad and touch wouldn't work. It was fine after I removed it.
Answer to: Replaced battery, phone turns on, screen doesn't?If you shine a light onto the screen can you see a faint image? If so, then the LCD connector was not inserted properly. It will need to be re-seated. Try it, even if it looks fine. In these tiny devices a hair's breadth makes all the difference.
Answer to: digitzer is not working after replaceDid you remember to remove the protective plastic on the inside (underside) of the digitizer? It won't work with that in place.
Answer to: replaced ipad 2 digitizer but its not working?I just replaced a digitizer on an ipad 2 GSM and had the same problem. On closer examination, I realized that I had not taken off the protective plastic shield on the inside of the digitizer. Once I removed it, all worked perfectly.