huh???
i kinda get what you mean, but a pic would REALLY help here.
like...
"cut off" as in.... should be there with that part of the picture but isn't. it's cut off. missing.
or
"cut off" as in... blank area, but the whole picture is there...just needs to be stretched to fill the screen.
also...what kind of signal are you feeding this box? from where? what resolution? why?