@Beobuddy: I really hope it's only the fuse. According to your experience what are the most common problems and solutions to this symptom (on/off lights). We'll go to Thailand next week, to bring the speakers at first, now on holidays! Maybe there is a specific spare parts that we should bring back (tweeters ...)? Thanks

I am replying to a post of your back to 2015. I have a Beolab1 model 6843 (US) in need of that modeule. Not sure of port number but attached my picture.

If you have one, know someone who has one or can repair one, pleas let me know.

Thanks

KM

Hi Beobuddy, 4 years later I found your post on this... I'm one of the unlucky Beolab 1 owners where in this situation the fuse did not blow from what I can tell. The one obvious fuse on the circuit board looks OK. I'm to blame; hooked it up to a new Sonos Port (with the new 12V power trigger) without being careful (=reading the manual) and one of the two Beolab 1 units didn't take that well. I hoped that a fuse would burn, but that doesn't seem to be the case... Anyway, now the green LED doesn't come on. Too attractive a speaker to junk... Any advice? Thank you!
PS: I have another 4 Beolab 6000 hooked up to two different Sonos Ports and that works beautifully. / UC

You can dismount the amplifier (complete bottom part) and send it over for repair. 

The amps seem very reliable considering they are first generation ice power.

I've just noticed the coil on one of my woofers is scratching so I'm on the hunt for a replacement. B&O say they don't have any.

Yes, the amplifier/open circuit boards is lying around on my living room floor at the moment. ;-)  When you say "send over" I assume that you mean to an(y) authorized B&O Service Center? Thanks again.     

Should have responded directly to your entry and not have put it in the thread... so here we go again: 
When you say "send over" I assume that you mean to an(y) authorized B&O Service Center? Thanks again.    

I meant: send it to me. I'm able to fix most of these amplifiers (at my shop). Occasionally not when the boards are heavily burned. But that's not the case right now.
I need/want the complete bottom part, not just the boards.

Send you pm.

Interested as well. Please pm me too. I have a few things not sorted out from experts like you.