So I've noticed recently that while using my laptop, it's started to freeze. While initially I thought it was due to the OS being slow or a memory problem, I quickly noticed it was a hardware problem. At first it was a rare occurrence, now it's almost permanent. What I've noticed is that only movement of the screen can get it back to normal. I have to brace the left side of the screen for it to even show properly. Now it's not showing at all. What could this be?