Wow ! What a miracle !
The battery exchange has worked a lot.
Most of the issues are gone.
Both DSP works fine now.
Only the damplingfrequencies 88,2 kHz and 96 kHz are not available in the settings menu.
Only 44,1 kHz and 48 kHz are availabe.
Is this normal ?
Is external digital signal required for having access to 96 kHz ?
Thank you very much for help !
The hint with the battery was great!
I had no idea that such devices would have an internal battery.
It took a few startup sequencies to get all the issues sorted out.