Since your receiver does not have component video inputs, you cannot use the component outputs (if any) from your dvd player or HD cable box.
If you have a HDTV, hook the component video outouts of each device directly to the tv, and hook the digital audio from each to the receiver. Use the receiver to switch audio sources, and the tv to switch video sources.
If you do not have a HDTV hook both audio and video to the reciever using s-video connections, and then connect the receiver's video monitor out to an available TV s-video input. You can then set the TV to the appropriate input, and switch audio and video sources from the receiver.