Everyone, many thanks for the quick replies.? I did not have batteries in the AN before this (which is why I discovered the issue!) but I do now.? We hosted a star party last night and the issue did not pop up, so the batteries probably did their thing.
I did receive Gary M's comprehensive list of things to check and will start troubleshooting.? I will post again when problem located and solved or if I have further questions.
Clear skies and Merry Christmas and Happy New Year to all!
Paul