Yes, I can use the digital SPDIF optical connection and call it good. But, if at all possible I would like to have the HDMI connection also working. If for nothing else, to figure out where the issue is.
While I'm at it, I have a question concerning accessing the JRiver GUI. I have been able, following your instructions, to connect via the VNC viewer. I would, however, like to be able to interact with the JRiver GUI from a monitor directly connected to the computer. For now, all I get is the SnakeOil terminal screen. Is there a command to call up the JRiver GUI?