Hi There, All,
First off, let me thank you all for your rapid responses!...the community; the input, the offers of assistance! Thanks a lot. It's much appreciated.
Well, with your assistance, I'm happy to report, that I've got things working now, it seems. I was retracing my steps and taking some screen captures, 'twilling down'/expanding all the areas of connection (to reveal the plumbing), with a plan to be contacting you, Randy, when I happened upon the problem spot. It was a wiring connection after all, from 'scaler 2' to 'audio unit 2'.
Thanks again!
Nathan