Need help, screen went black.

[RedDroidGuy]

I know the whole, you root your droid you void your warranty deal. But how does verizon know you rooted your droid? A couple days ago i was making a phone call and as soon as i pulled the handset away, the screen never came back on, just stayed black. Is there a fix for this? And if not could i still go ask for a new one from verizon, seeing as its rooted and with no screen i can't unroot it. Because with no screen im guessing they can't tell that the device is rooted.