After reading the attachments on AppliancePartsPros.com about the flashing light error code, I determined that there was a problem with the optical sensor or ice maker control board. The replacement unit arrived a day after the order processed. I replaced the boards on both sides (left and right) of the freezer, and the ice maker started making ice again.
I'm really pleased with how easy AppliancePartsPros.com made it to find what I thought I needed to fix my problem, troubleshoot the issue to confirm the necessary repair, provide a video with directions for the replacement, order and receive the replacement parts, and ultimate get the job done.