Denon receiver - no sound from Blue-ray Digital audio outs
I had this same very frustrating problem with my Denon 3803, which does not have HDMI inputs, but does have digital audio inputs (coax and optical). The solution on my Denon was to set the Input - Mode button (on front panel of Denon) to "Auto". I discovered I previously had it set to "DTS", which resulted in no audio unless the DVD/Blue-ray disk was outputting DTS. This change in setting also allowed the Denon to receive digital audio out from my cable-box.