Hello, I'm Shahid. Sorry to hear that you're having trouble with this but I'll do my best to help.
- What is connected to TV for channels, an antenna or satellite box?
Thanks for the info.
Please press a few times Pic-Size button located on lower section of Samsung TV remote to achieve correct size picture on TV and push Info (i+?) button on same remote to remove on-screen display of DTV Terrestrial.
Please reply back with the result and if problem resolved then a positive rating to answer would be highly appreciated.