Try cutting the power to the dishwasher (remove the fuse) for about 30 seconds, then when you put the fuse back in, do it quickly and smoothly so you get a clean power-on without a lot of sparking. This may get the dishwasher controller to do a proper hard power-on reset.
If the problem persists, you may have a hardware failure in the controller. The first thing I'd look for is a failing electrolytic capacitor. Sometimes a power on-off cycle finishes them off. Fortunately, the parts are cheap and readily available from online suppliers such as Digi-Key or Mouser. Unfortunately, you have to have electronic component soldering skills to change them. Often, bad capacitors can be visually identified because the top of the capacitor is domed instead of flat, or for smaller units the aluminum casing is partly pushed off of the rubber or plastic base.
Contrast the bad capacitor on the right with the good one next to it on the left.
Try this:
Switch off the appliance by pressing the O N/OFF button. Shut off
the water tap to eliminate the risk of flooding and remove the plug
from the electrical socket.
Make sure the water inlet filter has not become blocked by various impurities. (see "Care and maintenance" chapter)
Contrast the bad capacitor on the right with the good one next to it on the left.
