Testing a refrigerator inlet water valve

Here is a good question that was posted in our Forums
I have a 1996 Whirlpool model # ET22DQLDW01. It has an ice/water dispenser on the front door. The water dispenser has suddenly quit operating. I can hear a hum when I press in on the dispenser lever, but not even the slightest drip of water. It appears that the ice maker is still operating ok.
I posted the easy way to test it:
Sounds like the inlet water valve went out. Its in the back of the refrigerator where your water supply line hooks-up to it.
If you wanted to do-it-yourself you could un-mount it and take off the larger of the 2 plastic water lines and get a small bucket, and have someone press the dispenser, if nothing comes out, then its your inlet water valve for sure.
Here is the water valve for your model:
Icemaker and water dispenser water inlet valve kit