Fredrik,
I have exactly the same problem - or should I say problems. But before I got to this stage I couldn't even get the system to operate at all. I contacted my local dealer and was told to switch off and restart the system and then disable the power save setting. I did that and got to the stage you are at now.
Since then I tried re-booting, switching off and restarting - nothing improved. I then accessed the MB5 to check the log files to see if I could uderstand what might have gone wrong. I found a folder called "crashes". This was a bit of a clue. The BeoSound 5 sub-folder had a number of files in it. I copied all the files from the BeoSound 5 "crashes" folder and sent them to B&O. This is the reply I received.....
"As we cannot see all details about the fault from the log files you sent us, we suggest you contact a Bang & Olufsen dealer for further help. We suggest you and your dealer try with another BeoSound 5 to see if that helps. We would also very much like to have other log files but that is also be a job for the dealer/technician:"
Very helpful....what's the point of having log files if you can't tell anything from them.
Anyway I have a technican coming this morning to look at the system and hopefully will get some idea what has gone wrong.