I've been using TVs as monitors for years and one thing I can say for sure from my own experience is this: Try not to let any static images stay on the screen

I've been using TVs as monitors for years and one thing I can say for sure from my own experience is this: Try not to let any static images stay on the screen for long periods of time. This isn't really an issue with actual computer monitors, but when using a TV as a monitor, it almost always leads to burn-in of the images. Another note is that you'll likely want to turn off some of the features that benefit you on the TV side of things (motion flow, image sharpening, etc). These features actually make the experience worse when using a TV as a monitor.