Well my father-in-law decided he was Mr. Fixit while I had run out to the store.. We pulled the unit away from the wall, and blew air through the icemaker fill line. You could hear and feel air coming through the fill chute in the door, so assuming not frozen and no blockage.
When allowed to cycle normally, the ejector arms would make a full rotation, and then the icemaker would call for water. You could hear the solenoid valve open, and could even hear water as it attempted to fill. It sounded like it would make it approximately to the two quick-connectors at the bottom of the door near the FRONT of the unit, and then a noticeable sound like the water was trickling back down the fill tube. It would not reach the icemaker.
Of course -- all of this is probably moot now anyway, as Mr. Fixit decided to use a jumper and start probing test ports. He inserted the wire into L and T. There was a noticeable spark, burned jumper wire, and now NONE of the test ports work. Ice maker does nothing. Any ideas on what he did? hoping he didn't backfeed voltage into some electrical components in the back of the fridge..... (everything else works -- lights, water dispenser, etc.)