HTC HD 2 is not booting fully
Hey all, i got one problem, i disassembled my htc hd 2 to desolder the old digitizer and to solder the new one, so i soldered, at first time it was not working, second time soldering - not working, that until i resoldered it 6 times, still, not working, so i soldered the old one ( broken one) tryed to turn up the phone - all normal, it turned, O2 logo showed, then waiting for a booting android-
Go! go! go! ........... AND nothing happens ( with the new digitizer it booted good, fully, after the old one soldering back to the place - it is not booting, just till this go go go).
So what could be the problem? Please guys help me to find out whats wrong because it is getting me nervous...