I have a droid 4 and when i open up the slider, the screen would just stay black. When I close the slider, it lights up again. To make it worse, when I hit the power button and hit it back up, the screen wont come up. The fone is not dead when it happens, the screen wont just light up again until I do a restart. Sometimes, it wont even come up even after a restart (power+vol down) . I have to plug in into a charger and do a restart to sometimes get it to light up. Then whenever I make a call or accept one, the screen will automatically die and not come back up. Any suggestions on a fix? BTW, this happens even when the slider is closed.