My DS has a black and ripped screen when turned on.

So one day I left my 2DS closed in a Garadge for probably a month now maybe. It has 0 scratches and everything looks fine. But when turned on it looks like the DS is coming inside out. Basically it has 4 white lines connecting, 3 in the bottom, one at the top, and as I said they look as if they are connecting. They have giant circles at the tips of them surrounded with a sort of rainbow thing, like a wire or something, and the lines had like a smudge look, and the rest was just black. It has sound and you can move the screen but you cant go into a game, it just puts you back if you press an app on it. It has the blue light as well.. Is this fixable and if so, how?