How can i fix my indesit idl500 dishwasher?

Hi,

I have an Indesit idl500 dishwasher and the first indicator light on the front of the machine (on the very left) keeps flashing. I have looked through the trouble shooting manual and checked the inlet pipe, sprayer arms, water inlet filter and the filter assembly but none of these have worked. I have checked there is water pressure and thats all ok and it doesnt appear there is any water actually going into the machine. Other then that there are no obvious problem. What would you reccomend or suggest? Many thanks