Like while anfieldude says, try to look for an option in your tv picutre to use the native resolution, in LG tv this is called "Just Scan", try not to use "Fit", "Stretch","Zoom" or sometimes "16:9" to try fit the input signal to your TV. The transmission signal sometimes have an "overscan" (black border) area which should be chopped off automatically by by HDTV. The "overscan" black areas are for old CRT TV's.