We found the probable cause online at the AppliancePartsPros.com website. Watched the "how to replace icemaker" video a few times to familiarize myself with the replacement process. Although the video omitted a couple of small steps, with the help of the telephone rep who sent schematics in just a couple of minutes I was able to make the repair.
The amazing thing was how fast the part arrived. I ordered it one afternoon, and it appeared on my doorstep the next afternoon! Couldn't ask for better service from either the representative on the phone or the people who handled the delivery of the part. A++++