I managed to repair a Nexus 7 with cracked digitizer. I used it with an USB or a bluetooth mouse, until I recived the new digitizer, so I was sure that all other things was working correctly. I separated digitizer from screen with a hair dryer, and a thin guitar cord tight on an arc (in place of the blade of a metal saw - I have a picture of this setup). Than I removed all the glue from the LCD, cleaning it with a little bit of alcohol. I tried to mount all without fixing the digitizer to the LCD at all, just to ensure that all was working. Unfortunatly there was a black hole in the display near top left corner, about 1 cm of diameter). I have no idea about wat it was due to, but I am sure it was not due to the alcohol I used to clean the display, since it was there before. The digitizer was not working very well, sometime it did not sense the touch, or it sensed it discontinuosly, so it was basically impossible to draw a continuos line. Probably because LCD and digitizer was not fixed togather, I thought....
