Burn in happened on my old CRT tvs/monitors too, but it took years to even notice when the screen was off, and even more to notice when the screen was on. The way this is written implies it happens after one or two days of normal watching. What about the very top/bottom black bars that are often visible on dvd/bluray? Some movies are more than 2 hours long? Now I'm stuck taking a break to finish LOTR or a Harry Potter? Honestly they should include a pixel 'test' mode that will 'recondition' the screen by cycling all the leds through different colors and modes. It's fun to watch on phones/tablets/monitors, it could be come the new tv screen saver!