I recently had to retire my DVD (Panny RV-31)and had to replace it with a temp (Mintek that I got for free for a best buy promotion). The Mintek has no optical out, so I went to Radio Shack and got their cheapest audio coax cable. When I hooked this up to my receiver (Yamaha RXV-620), I got a clear DTS signal, but no Dolby Digital or Dolby Surround. In those modes, the audio cuts in and out (mostly out) while the dolby indicator light on the Yamaha flickers on and off. Based on the Mintek manual, I have set the SPDIF setting to SPDIF/Raw, and I have changed the coax assignment to DVD on my receiver. Any thoughts?