How can I fix my Kenwood Dishwasher KDW 243A?

I have power and the light indicater comes on but nothing else will work, half wash, delay button or programme select.

I have added dishwasher salt recently as the warning light came on and since then it has this problem. The warning light is now not flashing but the all functionallity is not there.

what can I do to get my dishwasher to work Please