I also cracked my LCD screen, resulting in an intangible interface. This is because Blackberry only uses one layer of screen, whereas Apple uses two layers so that the phone can still be used after being cracked. I tried to replace it myself but it turns out you need very specific tools to separate the LCD from the screen. I ended up doing more damage than repair by trying to just replace the screen. A full replacement is needed unfortunately. It cost me about a hundred dollars.