http://www.plasmatvbuyingguide.com/plas ... urnin.html
From Page: "So, how do you prevent burn-in on your brand-new plasma television screen?
(1) Some obvious advice: Do not leave static images on your plasma TV screen. Turn off your unit when you are not watching it. Do not pause DVDs for more than a few minutes at a time.
(2) Know that plasma screens are more prone to burn-in during their first 200 hours of use. When phosphors are fresh, they burn more intensely as they are ignited. This means that relatively new plasma display panels are prone to ghosting, which occurs when on-screen images appear to stay on the screen belatedly. This is probably just a function of the high intensity with which new phosphors "pop," and this phenomenon usually "washes out" on its own, as the screen displays subsequent images. When static images are left on new plasma screens too long (more than a few minutes at a time), though, ghosting quickly develops into something more permanent -- burn-in.
Self-Defense: Break your new plasma monitor in slowly. Keep the CONTRAST set at or below 50% -- any higher only causes phosphors to glow more intensely, which decreases the length of time necessary for burn-in to occur. And, be sure to avail yourself of your plasma's anti-burn-in features. These are monotone gray or snow screen settings that "wash" your plasma screen by recalibrating pixel intensity levels uniformly. This reduces the visual effects of ghosting. It's probably a good idea to run one of these screen "wash" cycles after about 100 viewing hours or so. (Note: These processes will impact the lifespan of the phosphors in your unit, so you should run them selectively and on an as-needed basis.)
(3) Know, too, that some plasma display panels burn-in more easily than others.
In my experience, AliS type panels -- the ones utilized by Hitachi and Fujistu -- seem more readily given over to problems with burn-in.
(4) Utilize burn-in protection like power management settings, full-time picture shift (both vertical and horizontal), and automatic screen-saver functions. Check your Owner's Manual for further information.
(5) Realize that quality matters with burn-in as with everything else. You definitely want to purchase a plasma monitor that has really good scaling, so that you can watch 4:3 TV programs in widescreen comfortably. It is just not a good idea to leave black bars on your TV screen for prolonged periods of time, so you are probably better off watching most everything in "full screen" mode. This should not really bother you, if your TV exhibits good full-screen scaling. "