Have recently moved, and have therefore had to set up my home cinema system again. Am running a Sony DVD DVP-S735D attached to a Sony AV Receiver STR-DE585 - conected with both an analogue and a digital coaxial cabel. It works using the analogue setting, but only gives the basic surround or 'theatre, concert, hall, etc' settings - not full multi-channel 5.1 or DTS.
When I set the input to 'coaxial' it says 'unlock'! Have tried going through various settings on the DVD player, but nothing has worked so far. Have already made sure that the ouput mode is set to digital on the master setup page, and that both DTS and Dolby Digital have been activated, but still no joy.