What you can do on this if it has the European plug top on it is cut it off and replace it with a normal UK 3 pin plug top.
As the wiring will be the same ie 3 core live, neutral and earth. So rewire it with a normal UK plug top and then see how it goes from there.
As the dishwasher if its come from spain should work here as its the same voltage and Hz so it will work fine in the uk.
So try a new plug top and see if this works and let me know.
Ok so if the plug top is fine and the sockets are as well then its a fault in the dishwasher.
Remove the outer door panel and then remove the plastic control panel.
From there check the wiring on the control board and the switches on there aswell in case theres bad connections on the wiring. If the connections are fine then you need a test meter and check theres power going to the control board. If there is then its going to be a faulty control unit which would need to be replaced to cure this.
But check the wiring first if you can incase its a loose connection on there.
Yes thats it. As you pull down the door you will see the screws on the inside of the metal inner door. Remove them and then you can remove the outer door and the control panel from there.
Is there anymore info you need on this?
Ok no worries. Did you check it and was it faulty?