Hi,

Did you set up a new source to the 861 for the Oppo or just unplug one of the working ones and substitute it?

Is the 'Stereo' you are getting really Stereo or just the front 2 channels of the surround mix (Rolski)?

Does the 861 display show 'discrete' (or some other multi-channel setup) when you select the source you have designated and push 'play'?

Regards

Paul.