Hello, I'm using a Dell laptop, Windows 10, and the screen keeps going black, even though the computer keeps running. If I shift the screen, or move the laptop, it just goes black-but if I tap the side of the screen, it turns back on again. It doesn't turn the laptop off, just the screen actually stops displaying. I'm worried I'm going to cause damage to the laptop, as the tapping on the side of the screen is getting progressively less effective, and I have to hit it quite hard to turn it back on again. Help!