Ok so I cracked my screen about three days ago was still able to use the phone LCD and all that was ok just the glass was broke so i bough a replacement for it and replaced it last night at first I put everything together and before I closed it and put my final screws in I turned it one to check if it was all working and it was so I fit it into the back and the screen went of like it was restarting opened it back up everything was placed right but now I was just getting a constant iTunes logo but nothing else so checked the connections again all done in the right spot but for the last time I put it all back together now all I get is just a lite backscreen I don't know what to do plz help