Hi! My name isXXXXX am happy to help you with this! Please bear with me and be patient as sometimes these issues take a little bit of figuring out before we know what's wrong. If you could give me some more information it will be very helpful:
-How is the cable box hooked to the tv?
The choices are:
Component cables: 5 wires between the tv and the device, these are color coded on the end and have a green, a blue, a red, a white, and another red cable
Composite cables: 3 wires between the tv and the device, these are color coded on the end and have a yellow, a white, and a red.
HDMI: 1 wire between the tv and the device, this is a single wire and looks like a computer plug on each end, similar to a large USB connector.
Coax: This is 1 wire between the tv and the device as well. This is the normal cable wire with the end the screws
Please give me this information and I will be happy to assist you further.