So, the technician came and did some tests and he also could not understand, what the problem was.
He unplugged the antenna cable and plugged it into his device to measure the signal, everything was fine.
Plugged it in again, still the same.
Then he removed the DigiCard and all of a sudden, the signal was here.
Remember how you had told me to try that and I had actually tried? Well, when he did it it worked.
He then plugged it in again, and ever since, the channels are working. Maybe it something’s a bit loose in the CI+ adapter.
Anyway, the scrambled signal (for example channel 698) is still not working. It says “Scrambled”, the popup about setting up the card shows up, but nothing ever happens.
This might be due to the incompatibility.