Burns on an LCD screen can be the cause of endless frustration for the TV watcher. Screen burns are caused by leaving a fixed image on a screen for too long, which causes a "ghost" of that shape, design or color on that part of the screen that persists, obscuring other images. The damage is usually not so bad as to make it impossible to watch anything, but significant enough to impede the watching experience--particularly if it obscures some important piece of information like the score of a game. There are solutions to LCD burns that don't require sending in the unit for expensive repairs.
Hook up a standard computer to your LCD TV screen. Instructions for how to do this should be included with your TV. If you have lost the instructions, the manufacturer should have a copy of the manual available.
Create a blank white image in the image editing program of your choice.
Set the image as the screen saver for the computer. Activate the screen saver. Increase your TV's brightness to the maximum level. Leave it on for as long as the image burn remains, then unplug the computer and continue running the TV as usual.