Well, I got online and found several YouTube videos on how to check what was happening. I have a multimeter and tools. I first replaced the external water filter just to make sure it wasn't that, and it needed it. That wasn't the problem. I then removed the water inlet valve which was really easy. I didn't disconnect the water lines but I did unplug the power plug. Using the ohms setting on the meter, I tested the coil of the valve solenoid. It wasn't open. I checked the voltage at the plug with the AC voltage setting. It read 15 volts. I incorrectly assumed that was the voltage necessary to open the valve. So, I ordered a new valve. While I was waiting for it to arrive I did some more digging and found that the voltage at the valve during water demand should be pretty close to whatever line voltage is coming into the fridge (115v). So I had to keep digging. I found some forums that discussed how the voltage gets to the valve, etc. I pulled the cover off the ice maker to expose the gears of the motor and drive. I used my flat blade screwdriver to slightly turn the main gear of the motor and it started turning on its own, but kept stopping. I was able to, with a little force, make the main shaft go all the way through the ice cycle and I got it to dispense water, which told me the water valve was working. I checked the voltage coming into the icemaker and it was 115v. So I ordered a new ice maker unit. That took about 5 minutes to remove the old and reinstall the new. I let it get good and cold, and it has been cranking out ice cubes ever since.