Well I am an electrical engineer and it seemed literally impossible to me, but knowing that everyone can be wrong I looked it up myself a bit. Seems like you can, but it's not the same "burn in" as in plasmas. It has to do with the lifetime of the single LEDs. But you basically can avoid that by using the right settings, and even if you don't, you'll have to keep your TV on with the same image 24/7 over weeks. And this won't happen by chance.