I opened up the plastics and cleaned it. It looks like there´s a electro magnet that controls the switch, it´s really simple. But when i put it together the magnet doesn´t seems to work anymore and I don´t hear the clicking sound... But if i pushes it manually, without the plastic case i get sound in both speakers on channel

Okay, thanks. I´ll try that. I´m pretty sure i shortcut the + and - poles on the first left channel by mistake, so that might have blown the relay. The second left works, so i cannot have blown the entire channel, right?

Why will it help if i clean it, and is it the contact points under the motherboard i shall clean? Edit: or is it inside the relay?

Thanks a lot for the help! I took some time taking pictures inside my Beomaster 4500, and I found the "clicking" muting relay, wich is marked "speker relay" on the motherboard. I marked this one on the third picture. Over to the pictures: Is it just to go to a local Bang & Olufsen shop and ask them if they can order a speaker

Hi! I have a Beomaster 4500 hooked up to my Beovision MX 6000. Beomaster 4500 has two left and two right audio channels. The first left channel is dead, I think i might have shortcut it by mistake long ago. However the second left channel works perfectly fine but I would like to be able to use the first channels since I want to use my MCL on the second