My screen went black!

[Singer_Actor]

Okay so recently I was noticing that my screen would go black after a call, and I would have to restart it. Well now, its just not turning on at all. the Backlight comes on, and the touch still works, but theres no screen. I am able to get it on once in awhile, so i backed up everything, and saved all my important information, but when i touch the power button to turn off the screen, it wont come back on. Im not having any luck getting it back on.
Any ideas? This is i think my 5th touch pro, from Alltel. And with the switch to verizon being permanent, im not sure if I can get a new one. And Im not using my insurance for this bull either. They will cover this right? theres no water damage because my sensor is still green. ANy suggestions??