How to Set Up a Comcast Digital Converter Box
- 1). Connect the cable running from the wall into the "In" port on the rear of the Comcast digital box.
- 2). Plug the component video cables into the red, green and blue "Component Out" ports on the digital box. Attach the free ends of the cables into the "Component In" ports on the television.
- 3). Insert the RCA audio cables into the "Audio Out" ports on the Comcast digital box, then attach the free ends of the cables into the "Audio In" ports on the TV.
- 4). Power on the television and the Comcast digital box. Set the TV's input option to "Component Video" and the cable programming loads onto your TV screen.
Source...