When I do an a/v connection directly to the TV, the video works fine, but the audio is muted - if I max out the TV volume, can just barely hear sound. If I move the a/v cables from the Tivo to a DVD player, audio works normally. Previously had a/v connected thru a receiver, no audio problems (would prefer not to use a receiver and speakers due to temporary space limitations) I've contacted tech support, and they're stumped. Tried both Dolby Digital and PCM settings, no change. Tried rebooting several times, briefly got sound on one of the reboots, then lost it again. Any ideas? Thanks!