Do you have both component and HDMI connected? Try removing the component connections and reboot everything (you might try unplugging the Tivo to get a complete reboot). I've got the same set up (HLP6163). My Denon DVD player is conneced to DVI and Tivo to HDMI. If I try to also connect my Denon with component cables, there is no component signal. I suspect that the Denon detects which is hooked up and switches to DVI if it detects a connection. The Tivo may do the same --but maybe prioritizing the S-video over the HDMI.