Ok just remove the bottom kick plate. The water inlet solinoid is probably bad. To test it remove the wires going to it and start a cycle. Measure the voltage acrost the wires with a volt meter. You should have 120vac. If you have voltage change the solinoid. If no voltage let me know and Ill provide additional diagnostic information.
The solinoid is what the water line connects to from the house source.
Testing the control board.
You can get an inexpensive meter by clicking here This is the same one I use.