Samsung Plasma display (Does see media files on my NAS)
But does the
Yamaha Samsung see JRiver available as a Media Server, or just the NAS running its own DLNA server?
If neither the Samsung or the Yamaha can see JRiver available as a DLNA Media Server, then something hasn't been set up correctly in JRiver MC. It isn't a problem with the Yamaha.
Is the NAS also on the same router as the PC and the Yamaha? Do they all have IP addresses from that router? Same subnet?
Have you restarted the PC after turning on Media Server in MC?
Do you run JRiver Media Server on Windows startup?
Have you tried with authentication turned off in MC, and is there a place to enter the PC's User Name and Password into the Yamaha? (I can't find anything in the manual. I think it is needed on the renderer for an authentication to connect. I can't remember exactly. Try without authentication anyway.)
TAO1857, I have a Samsung TV that is a DLNA Controller and Renderer, and it has never appeared as an Audio Device. It is always just under the Playing Now heading in the left navigation bar, as per the image below. DLNA devices are automatically created dynamic zones. Unless you meant to select the Yamaha zone at the top of the Options/Audio dialogue, rather than in the Audio Devices section?
It is not clear what audio formats the Yamaha's DLNA renderer is capable of really. The list on page 145 of the manual is a little confusing and/or limited.
Check out this:
http://www.whitebear.ch/dmra and DLNA posts by the author, AndrewFG, to get a better idea of what the Yamaha can do.