Thanks for the response. I have the cable box on and the other components work fine (my receiver, apple tv, and DVD all work). I have the 250 external antenna mounted about 3 feet away from all components. I am using the IR extenders to each component.

All components are on and everyone works throughout my living room, dining room and kitchen, except for the cable box. The cable box only works for a section of the living room. Could it be a problem with the cable box or the IR extender?