We moved in 2019, and the new house has a gate opener. After three years of loyal service to us, and who knows how many years of service to the previous residents, it finally died.
After some troubleshooting, I called Mighty Mule tech support (A+ by the way!) to discuss my options.
Faced with a cost of $350 for a new controller board for my now-obsolete MM560, or buy a new MM571W for about $100 more, buying a whole new unit made much more sense.
Here’s the full details of my troubleshooting and installation efforts: