This is my laptop, it is a gateway NE56R41U.


One night I'm using my laptop using my headphones with it and it works perfectly.
I close the laptop and do something else.
I go back maybe an hour later, turn it on, and all I get is this screen:

My only guess as to what has happened is maybe I shut the lid with the headphones still laying on the keyboard and one of them hit the screen.
My two questions here are:
How can I tell if anything else is broken, or if it's just the screen?
How easy is it to replace a laptop screen?
I'm already looking at no less than 50$ for the screen from what I found and I really don't have all that much money, would like to try and do this myself.