No function

Hello, I have cleaned my B40, including the ground coffee filler area, and since then it no longer works. The display says "lid closed". Unfortunately, I have no idea how to reactivate it. Anyone familiar with this problem?
Thanks in advance for your help
Lg Ronny

And what is a B40? I only know the B40 as a federal highway.
Manufacturer might have been interesting.

It's a Bosch Buenevito, identical in construction to a Siemens S40.
Regarding your question, there's a magnet in the powder compartment lid.
Did you lose it during cleaning?
Put a pin board or fridge magnet on it.
It will work for now. You just have to look for the position where the Redd contact is located.

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