It sounds like Miscanthus's TV can handle PCM stereo over the HDMI input, but not DD and DTS bitstreams. That's not too surprising - I don't know how many TV's with HDMI inputs include even rudimentary DD/DTS decoders. There's some discussion of this issue in this thread at AVS forum - sounds like a common affliction that may not have a good solution (there is mention of an option under "Display" to turn the on-screen messages off, but it sounds like it may reset to "on" when the unit is turned off).