M20E-TN

Update after being out of town (Reno National Championship Air Races) for several days: This session is now working after I deleted the following from PANEL.CFG for the Bravo:
Window01=Radio Stack
Window02=GPS
Window03=Annunciator
Window04=Overhead Panel
Window05=Mini Panel
I have no notion yet as to why this matters, and it may well be incidental, as I may have inadvertently made another change. That's difficult to accept, however, since I've only been on the PC (Master) for about an hour and confirmed that the VC panel was still not responding (normally clickable switches were not clickable in IG mode) On a whim, I decided to simplify the panel contents just for "fun", lacking any sound ideas. In any case, voila!
I'll edit again, or reply (probably a better option at this point) when I have more information. No one else must care, however, noting the dearth (zero!) of replies to this post.
 
Marking this solved, although the resolution is not clear. I may post back with new information as it becomes available, i.e., as I make new discoveries. PS: looking forward to V2!
 
Jim