Magic Chef Dishwasher (rotary dial) running with NO water coming.

Was away for 3 weeks and when back I tried to run the dishwasher and although it started up when activated it was evident no water was coming in. It's a fairly old machine (5 years or so) but isn't suffering from too much wear and tear. Something is stopping the water coming through though not sure what. Please, any ideas that might solve this would save me time and money!
Thanks in advance.