A few Hours ago I was still using my Instinct without any problem, but just now when I unlocked it the touch screen became irresponsible when I touched it. The side buttons are still working, all of them. I have tried power cycle many time but no luck. I have no idea what happened but I can guarantee that there was absolutely no drop or damage of any kind.
I googled a little and found this on youtube. http://www.youtube.com/watch?v=rst5yv2cc-w
This guy has almost exactly the same problem as me.
Please Help! Thanks!
And I just realized that the screen would not turn off automatically (No Auto Lock) unless I press the Lock button.