I hope this is not the case. I would consider it as highly unlikely since the TV is in super shape. Also, speaker 1-4 work as they should, which I would again consider quite unlikely if the surround module was defective... After a littel research, I've figured the following:
I use Scart 2 which is the Decoder scart for connecting the DVD2 to the Avant. Input 2 corresponds to Scart 2. That's why input 1 didn't work for connecting the digital coax. Now that I use input 2 it works.
Scart 1 is the AV scart. However, AV scart didn't work with the DVD2. Don't ask me why. The DVD2 just didn't receive a signal. As far as connections are concerned, in the menu, there's one named Decoder. Right no the option is "NONE". Should it be "V.Aux" or something?
Additionally, my Avant is type 8430. Therefore, it's the VCR Avant. It seems to have the older version of the Dolby Surround module.
Is this information of any help? Any ideas how I get speaker 5 to work? Setting up Bang and Olufsen surround sound has turned out to be far from easy for me...
Rgds,
Kai