When I press the lock button on my phone, the display sometimes turns on, other times it doesn't. The touch buttons on the bottom of the phone (menu, home, back, search) light up and work, and the actually touching the screen works, (I can still answer the phone and whatnot from memory. I recently re-rooted and insalled CM9 Beta and the problem got much worse. Now I have reflashed back to stock and the problem is even worse. I just need some advice. I am thinking it could be some files got corrupted or maybe hardware. Any help is very very much appreciated.