After thorough cleaning of the left speaker, both speakers started working. Now the left speaker will work for about 20 seconds and then stop. If I move the switch on the back it will work for another 20 seconds.
I think it’s time for the trash bin. I’ve had the console repaired twice by B&O to the tune of over $900 each time.
Update, yet again. It appears to be a problem with the console, not the speakers. If I plug in a source to the “line In connection it works without issue.