Xbox 360 screen moved slightly to the left. How do I fix it?

I left my Xbox for a couple of weeks cause I was getting bored of the games I had. I come back to it to find that, somehow, the screen has moved slightly to the left. A couple of centimeters. It's highly noticeable and very annoying.

It's not my TV's fault because just watching shows doesn't have the black bar.

I've looked all around the 360's settings but can't find anything to move it back over. What can I do?

Bumpity Bump.

Settings, I think this happen to my Xbox 360 too!