Here is a page with various technical details about the device:
https://www.prad.de/technische...
Perhaps this will help.

Does the TV set have a built-in SAT tuner? The TV set does not recognise any channels... and reception still works on the previous TV set!
I have tried everything... without success. Does anyone have any tips on what to look out for or what else needs to be set? Is it the SAT?
Thanks in advance