i was using my 8530 last night on a long car ride... went to check it about 30 minutes ago and it appeared to be off. it hasn't been dropped or gotten wet. i tried turning it on and it wont respond, so i connected it to its charger and it still wont do anything. took the battery out next, and it's still completely unresponsive- no flashing indicator light or anything. if anyone has any ideas or knows what i should do i would greatly appreciate it!