kenmore elite ice maker not working

My ice maker has stopped making ice. The ice make does have frozen water in the ice maker tray. I removed and thawed the ice from the ice maker. When reinstalled, it put water into the ice maker, but never completed the harvest cycle.

Leds blink twice, then delay second and repeat. This indicates a problem with the optics boards. Can anyone confirm I am on the right track before I order the parts. Also any part numbers for this would be great too. Thanks. -RB