Ozan, THANK YOU! The 100k resistor had failed open. I can¡¯t believe it. I'm slightly embarrassed, because I was sure I had already checked these. It is always a great idea to have a second set of eyes look at things. I¡¯ve been diagnosing this unit on and off for months. You have definitely helped keep an amazing piece of engineering out of the recycle pole for a 1 cent part.
Be well and have a wonderful week!
John Q
