Beomaster4500 hard blop sound on speakers when switching on

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Toine1 Posted: Sun, May 4 2014 8:43 AM

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I did buy a secondhand BlingBling Beo 4500 serie that is containing a Beomaster 4500.

When I plug-in the beomaster 4500 I hear a hard blop sound on my very expensive nonB&O 8ohm speakers, which sounds no good for the speakers life time.  No blop sound when connecting this speakers to a Japanese reciever.

So I did program the Beomaster to volume 0, but still I hear this sound when connecting to the electric mainpower.     

Before doing a complete capacitors exchange overhaul job, I would like to know, do I make somewhere a mistake in adjustments, as a sample, MUTE could not be programmed as a default to on,  is there a way to program MUTE on?  Switching to the secondary speaker output had no effect.

Or is this normal on a vintage B&O and just a matter of get use to that. Any help in finding the right root cause is more then welcome.

edit are there any good manuals in how to open en replace capacitors on a Beomaster 4500