I have a Playbar that is just 3 years old, after recently moving house, I am getting a high pitched noise from the playbar, It still plays music OK, but you can hear the high pitched noise behind the TV or music sound. All of the other equipment is the same, I have tried in various rooms around the house and even at my sisters house (to eliminate any electrical issues in my new home) It is very annoying - like tinnitus!!
I have seen many posts on this community and seems it is a known problem. I have done a factory reset as instructed on the other many posts about this topic and the sound goes away and then comes back during the setup. I have submitted a diagnostics report:642892514
Best answer by Ronbot1984
Sonos are in the process of replacing my unit. Thanks