It's not simply muted is it?  As far as I know, the MUTE button just mutes the PL outputs and not the headphone socket, which has separate volume control when PL is muted. Otherwise, any results from repeatedly pressing mute whilst speakers are connected? (and headphones disconnected) One further suggestion:  In case the headphone socket has any muting function, try repeated insertion/removal of headphone plug (and possibly clean internal headphone contacts).  

Thanks,Guy, I tried everything.On powerlinks,beolabs are not activated.Won't turn green,remaining on red lights,on any audio source from Ouverture.On line-in inputs all functioning as it should.  

I would check the 3V battery to see if it has leaked and etched the board beneath it.  I had a BS3000 with the same symptoms and it turned out that the battery had leaked and the acid etched the traces.  The battery is on PCB 3 (Microcomputer). Bill

Good point from Bill above!  For info, here's some pictures showing the battery location in a very similar layout BC2300 - you have to remove the metal cover to access: Login to view image Login to view image

Hi, here's further reference to the headphone socket and it's relation to powerlink.

Location: Kent, UK

My B&O Icons:

BeoCenter-9500.png

Beoremote-Beo4.png

Beosound.png

Beoplay-H3.png

Beomaster.png

Beofan for many years with a penchant for 1990s audio systems.

On both powerlink outputs no power(reading zero).As I am not skilled,will send it for repairs.