This always happens to only the right spkr? Are both plugged into the same or different power outlets? If different, are the outlets on different house circuits or the same? That might take some investigation, but I suppose it's possible that if they are on different circuits you are getting noise spikes or corrupted power on one. You might, once it's fixed, try a good filter/surge suppressor and run that and both spkrs off the power outlet the left spkr uses. 

About all I can think of, unless what's driving the signal to the speakers is having problems. What is the source to the spkrs?

Might be obvious for you, since you've had the problem before, but have you checked the source?

Hi Jeff thanks for your feedback.

Yes only occurs to the right speaker.

Yes connected to a different power outlet, which I believe are on the same ring main/circuit connected to a new domestic mains fuse box with RCD's and circuit breakers. I will check with our electricians and get them to validate the outlet - fused plug to speaker already checked and base speaker in the unit still working.

In terms of the source to the speakers this comes from a BeoCenter 2(recently replaced in last two weeks with a BeoSound 5) and BeoVision 7 connected to a SKY box and 1st generation Apple TV (white unit). The last two occasions this has happened the sound source has been iTunes from the Apple TV through the BeoVision 7 but with the speaker setting on the TV set to only play through the BeoLab 5's.

Hi Bayerische,

On the last two occasions the source has been the same - 1st generation Apple TV running the latest version of software at all times, connected to a BeoVision 7.  I was not around when it happened the first time within a couple of months of them being purchased and installed.

Sound still behaving correctly and sounding great through left BeoLab 5 speaker OK, on each occasion...

Have you tested switching the left speaker to the right channel? That way you can eliminate the possibility of the Right channel having a problem from the source.

I hate to bring back a 3 year-old post, but I'm actually having a similar issue. The upper bass unit of one of my BeoLab 5's just stopped working. The pair report green and don't indicate any problem. Calibration works fine (although seems to linger at one point because of no sound from upper bass).

The B&O tech tried replacing the upper bass unit itself, but no change -- the speaker itself works fine. So it appears the only option now is completely replacing the electronics module for a ridiculous cost.

Were you ever able to figure out the issue? Did you have to replace the electronics unit?

Did you continue to have any issues?

So frustrating!

Thanks,

- Nate 

Hello everybody,

my BeoLab 5 has now the same hissing and room calibration doesn't work anymore. Microphone comes out and the LED blinks red. Seems like the electronics are damaged. Anything I can reset? How much does the replacement of the electronics cost?