After watching the video I was able to determine how to access the internal components. After that, I concluded my problem stemmed from the solenoid which was all rusty and corroded. It sure looked like it needed replacement.
I ordered one along with a new door flapper, crank and spring. Again watched the video and installation was relatively easy. However after getting it all installed I tried manually operating the door flapper, and it would never close. I thought I had installed something wrong. So I disassembled everything and started over. Same result. The door just would not snap closed.
It appeared the crank rod was binding in the little recessed groove. I was going to "modify" the crank rod, but decided to install the circuit board and door trim, plug it back in and give it a try. Guess what? It worked like a champ. I couldn't figure out why it would work with power, but not work manually without power.
Then I remembered reading somewhere on here about a 5 second delay before the door snaps shut. Obviously that was it. It needs power to operate correctly.
Oh, one more thing. The water line. I disconnected it at the coupling down at the bottom on the outside of the door (remove the grill plate - 2 screws) and pushed the paddle and water flowed. So, that indicated it was just a frozen line somewhere in the freezer door. Probably caused from the cold air leaking out around the flapper.
Unplugged unit and let it unthaw overnight. Next morning, water again. All fixed.
Turned out I didn't need a new flapper, crank, or spring. Just the solenoid. The old ones cleaned up nice. Now I have a few spare parts for next time.
An assistant with a good flashlight helps too. ; >)