That's all I need - a fat puppy!
After thoroughly reading the documentation, I did the soft reset and while the unit reset, that lasted about five seconds and it went back to a fail indicator.
After reading the documentation more thoroughly, I see the hard reset, which requires the 12v power to be disconnected, might be simple since the 12v connection is just a lug on the box. I thought it might be internal, so that seems easy enough.
Interestingly, I believe my unit has a five year warranty - but since that five years was up 90 days ago, no help.
Factory refurbs are almost half the ~$1500 new on the Internet cost, but their warranty is 30 days, not unusual, but ....
Have a line on a dealer on the way to our wintering location, waiting for a quote, and that might be how this gets resolved.