dishwasher not spraying water

Repair man said I needed a new pump and would cost $350 to repair. This dishwasher was only 5 years old and we only use about once a week so didn't think the pump was gone. Went on this website and read some stories. this model has a mini garbage disposal with a chopper and screen which gets clogged up and prevents water from circulating. You can clean the screen without removing the dishwasher. Remove the cover plates on the bottom with 4 screws and the smaller cover plate underneath. Remove screen, clean and replace. If the chopper is broken you can order a replacement for $21. There is another story on this site with a lot more detail so I wont repeat here.