Samsung Electronics Co., Ltd. Informative - Beware of possible LCD screen damage
SIERRA VISTA, ARIZONA -- This applies to any LCD flat screen TV, not just Samsung. Even though 98 % of all TV's manufactured today are built to accommodate the widescreen movie formats you will find that many of the TV programs are still broadcast in 4x3 format. This leaves large black bars on the right and left sides of the broadcast. If the bars are allowed to remain for more than 15% of your TV viewing it can burn the LCD screen. Once the screen is burned then you will see a vertical line at the point of the burn; it will either be a dark line or a light one; sometimes dark on one side and light on the other. You can prevent this burn by watching all programs in full screen mode. This means that a normal 4x3 broadcast might show up a little distorted (people may seem a little fatter than normal) but it's worth not having the screen burned. Some of the stations are broadcasting color on the sides of the main program in an attempt to reduce the burning. Somewhere on your remote control you have a "format" key that should allow you to widen the picture until you are watching in full screen mode. Some manufacturing warranty's (including Samsung) won't honor the wty if the screen is burned in this manner.
Hopefully one day the broadcasters will get some kind of standard in their broadcast so the pictures won't jump back and forth between standard size and wide.