Dishwasher would fill properly but when wash cycle would start you could not hear any water spraying.

First I removed the lower spray arm by removing the middle retainer nut. Next remove the 3 screws holding the outer shroud in place. Next remove 6 screws holding the water pump top housing in place. Under this housing you will find the impeller which is retained by a screw. Check the impeller closely for cracks especially near the center hex portion of the impeller. Replace if you have any doubt of it's integrity. Next remove the lower pump housing that has the screen material in the center. What I found was the nylon part that attaches to the shaft of the motor was stripped so the impeller would spin in it's normal direction ( counterclockwise) but under the load of water it would not. So I ordered a new impeller and seal kit with a metal sleeve and chooper blade. Follow the instructions provided in the new kit a reassemble accordingly.