Screen ( start) problem

[Canessa]

Hello..i use the samsung p2 to listen to music while driving.one night i stoped in front of a store , paused the player, went in, bought something, got back into the car.When i turned on the player nothing was visible anymore on the player's screen.I could hear the music but that's all.Got back to the house connected the player to the pc..deleted all the files reinstalled them,upgraded the program but to no result.I tried to format the player, i even tried the reset button.
before that night i would like to mention i just charged the baterry,when i left home it was full and i didn't install any upgrade.
Got any ideas sugestions for this? the player is still in guarentee but i don't want to go to the service if i can fix it myself..
Thanx a lot!