I am a long-time browser, but first time poster here. I have read much on the issues concerning the 811, many of which I do not have. I have encountered one that I can't seem to find anyone else having. I have audio on HD channels and on OTA material, but no audio on Dish SD channels. I have tried doing a power reset on the receiver, but it did not work. Anyone else have this problem or have suggestions? Thanks for any replies.