Sounds like a problem with the screen itself. I would take it back to where you got it and ask for a new one to replace it. It mat have been damaged during shipping. Return it !
I have a new laptop, it's Windows 8.1, Satellite C55. Recently I noticed something that looks like a crack in the screen, it's curved slightly and I noticed it moves?? I just tilted my laptop screen when opening it and it slid down. What could this be?