2 days ago my Xbox started playing all my games and movies in a greenish tint, and I can't figure out why

. All the cables are plugged where they should be and I haven't changed any of my color settings. Has this happened to anyone else? Or does anyone know why it's doing this? It's really annoying to watch movies and have everyone look like Shrek

. I'd appreciate any help...thanks!
Here's what it looks like