A follow-up.
After completing the Small Claims paperwork - the clerk recommended on last call to Rand-McNally. The young gentleman who go my call did some research, called me back and said a unit was being shipped to me.
A new 7725 arrived this evening. (It was delayed 3 days at UPS in Dallas due to the ice storm - UPS responsible, not Rand McNally).
I received a PM, and a follow-up phone call from a manger at Rand McNally on Monday. He assured me that the entire case will be looked into in detail, and he will also express my appreciation to the young Customer Service rep who actually go a unit shipped to me.
Electronic stuff breaks. It happens, just like any other product. Usually electronics break very soon after they go into use.
I've worked around radio and television equipment, computers, servers, networking equipment for over 45 years and don't get upset is something breaks. No quality control can be perfect.
Given the number of units they sell, and the number of complaints I see - I doubt the units have a worse failure rate than Garmin or iPhones.
My only frustration was the delay in getting me a replacement unit - and I am very satisfied that my experience is being addressed with the Tech Service team, and the actual repair/ shipping team.