I have a Comcast HDTV box, feeding into my Sony Bravia home theatre system via coaxial cable, then to my HDTV via component cable. However I do not get a picture this way. I know I can connect the cable box and the home theatre system via separate component inputs, but is there a way to use both without switching inputs? Thank you!

From Disney*Pixar comes Up, a comedy adventure about 78 year old balloon salesman Carl Fredericksen, who finally fulfills his lifelong dream of a great adventure when he ties thousands of balloons to his house and flies away to the wilds of South America. But he discovers all too late that his biggest nightmare has stowed away on the trip: an overly optimistic 8-year-old Wilderness Explorer named Russell. From the Academy Award(r)-nominated director Pete Docter (Monsters, Inc.), Disney …