I have an HR21-200 connected to a Yamaha HTR 6130 with an optical cable. I have Premium HD service. The Yamaha is set to auto decode either Dolby digital or ProLogic depending on the channel. On most of the local channels (Socal Los Angeles area) I get no sound when the Dolby Digital shows on the receiver part of the time. Actually I get some of the SubWoofer .1 sound but none of the other 5 speakers. Usually this happens on some commercials but the program is fine. Last night I was watching Jay Leno on channel 4 KNBC and I had to use the stereo inputs instead of the optical otherwise there is no sound except for the SubWoofer. On most of the movie channels the Dolby Digital works fine. And yes. The HR21 is set to output Dolby Digital.
Any help would be appreciated.