Caffeo Lattea - Internal error

Hello! I
have here a Caffeo Lattea, which had a loose contact at the plug for the brew group motor.
In the
erroneous assumption that it was only the contact for the drip tray, I
bridged
the two pins
.

Now the three beans appear one after the other when switching on. Since I had to take the machine apart from time to time due to other mistakes in the past, I am not sure whether it has to be on the board or whether something else

might be possible.

Therefore to the more experienced ones: are the running beans only displayed if there are errors in the electronics or can there be something else behind it

?
Greetings Marco

For your information, all five microswitches work and the brew group motor can also be started with an external power supply. I can rule out a faulty assembly of the drive, I have checked that.
When switching on, 20V are applied to the pins of the motor, shortly after that the voltage drops to 70mV, without anything
moving.

After a few seconds the three beans come.