Samsung UN46ES7500FXZA E-Manual page 617

Try resetting the picture to view the
default picture settings (go to
→
Reset
There is a dotted line on the edge of the
screen.
If the
change it to 16:9.
Change the cable/satellite box
resolution.
The picture is black and white.
If you are using an AV composite input,
Picture).
Picture Size is set to
Picture
Screen Fit,