A common problem with flat screen TVs, plasma TVs in particular, is screen distortion, which includes issues such as dead pixels and screen burn. There are many different solutions, but one cost-effective method requires an external DVD player (even if the TV has a built-in DVD player) and a pixel corrector DVD.
//Start by disconnecting all devices from the TV except the DVD player. Use the TV's menu to navigate to the resolution selection screen, and choose the highest resolution supported by the TV. Insert the pixel corrector DVD into the DVD player and choose the repair function you need, or use the software wizard to guide you through the process.//
You can buy the pixel correction dvds smurfy but you need more tech info regarding the screen. Is it plasma or lcd or whatever?