No sound for DVD, Blu-Ray, or Cox via digital.


Sony Blu-Ray BDP-S360
Lexicon DC-1 Digital Controller
2 Rotel RB-980BX powers amps (2x120 each)
Pair of Sony SS M3's (vertically biamped)

I use no effects, equalization, loundness, etc. The DC-1 is set to "Bypass." The Blu-Ray player is connected to the DC-1 via toslink. Unfortunately, I only get sound using this connection when playing a cd. If watching a DVD or Blu-Ray, I have to switch to rca's--same thing for my Cox Cable box. I contacted Lexicon Support, and they essentially shrugged. Is it worth taking the DC-1 to a repair shop to update something (is it the dac)? Am I instead better off waiting and replacing the unit down the road? Any guidance is much appreciated.
poprhetor
The fact that it works for CD suggests that the DC-1 input is OK but that it may not be getting the signals it needs from the other sources. What does BYPASS do? The downloadable manual doesn't say.

Kal
Post removed 
This is an AV receiver (6.1), so why would it need a two-channel signal?

"Bypass " bypasses effects such as Logic 7, Panorama, etc. The issue is unchanged with or without effects. I suppose that was an extraneous detail. Sorry for any confusion.