Bosch Classixx Dishwasher will not fill?

So far I have tried to sort out the problem. These are the things I have tried.
I removed the lid and left hand panel.
The sump pan of the machine was filled with water and was lifting the styrene float thereby activating the micro switch controlling the evac pump for the flood control. There was about a just over a half inch of water.
I noted that the water being pumped only reached partway up the matrix and didn't go over the loop to run to the waste pipe. I tried to add more water to the sump to see if this improved, it didn't, the water just ran onto the floor.
Next I emptied the machine by tipping it over and the styrene float sat back on the base of the machine and the pump stopped. However there was no influx of water.
I noticed that the water matrix was not seating into the rubber O Rings on the unit below it properly, so I removed the matrix, adjusted the O Rings and replaced the unit.
I looked at the red float for the flood control and noted there was some dirt in its cylinder.
I removed the unit and cleaned out the cylinder, checking the float was free to move and able to lift for the lever to hit the micro switch. eveything seemed OK.
I switched on the machine and nothing happened. There was still no water ingress at all.
I tried priming the machine with water but it just flowed into the sump of the machine and the flood pump activated again. I tipped out the water again.
Next I wondered if there was a problem on the inlet pressure switch, so I disconnected the blue water pipe, switched on the power and no water came out of the pipe - the pressure switch was obviously closed. ( either by a fault or not being energised to open)
I next connected a water supply hose directly to the matrix. The water flowed in and the machine seemed to want to run a cycle. So I stopped as I believed it was going to work.
I now replaced the blue hose properly, made all due connections and hoped everything would run as it should. I switched the machine on and still no water entered the machine.
I have now run out of ideas, so can you kindly suggest anything less than taking a 7lb hammer to the thing?