I try to view the menu screen of the AVR300 but the picture on the TV is rolling so quickly that I can't figure out what I'm looking at. The only video going from my receiver to my TV is an S-Video connector. The video from my Tivo and DVD player go directly to the TV bypassing the receiver. Every once in a while the picture is fine such as during the first set up but also other times its fine but usually its rolling. Any help?