Troubleshooting potential causes, I finally determined the ice maker had failed. For no reason, the ejection arm had "stopped" in an incorrect position which was the biggest clue. I tested all the potential electrical fail points and each confirmed there was no issue there. That left only the motor to the ice maker failing somehow.
Removing the ice maker required NO TOOLS at all...simply release the holding clip and slide the maker out enough to unplug the IM from the freezer.
Once I received the replacement IM, I reversed procedure to install. This took 5 minutes. Within 5 minutes the ice tray filled with water for the first time in 2 days...the ice bin was full the next morning.