I have a friend that has a Maytag Quiet Series 100 Model number MDB5600AWW i can see that it gets water thru the air water inlet but the spray arms are not moving at all.No water comes out of them at all.They turn manually but not when machine is on.I have cleaned the filter.Have no idea what could be the problem.
Here are your parts includes a wiring diagram
http://www.appliancepartspros.com/partsearch/modelsearch.aspx?model=MDB5600AWW
Here is a manual which should help.
http://appliancejunk.com/forums/index.php?action=downloads;sa=view;down=83
You have to join the site to download the manual but it is free and this is a very good site for manuals and other info for the appliance repair DIYer.
Does the wash motor run?
Will it complete a cycle but not wash the dishes?
What is the water level in the unit? Most units should fill to just under the heating element.