High pitch playbar noise

Hello, I have just installed a Playbar, bought direct from Sonos. Suffering with a constant high pitch squeal, when the volume is up or not. I've tried powering down, and re-plugging all cables. Diagnostic number is - 4076604. Please help!

Same issue here, bought on Saturday just gone and tried all the advice above but constant high pitch unbearable whine when not in use. When in use slightly more bearable but still present. Next step please Sonos!?!
Ryan! I know I am an idiot but please bear - listening to sonos at friend's house - he's not here - string of songs on Friday, 10/17 starting at 9:15 PDT to 9:35? Their was some Arcade Fire early and it ended with the whistle song - we don't care about, etc. I swear I will join Sonos if you give me a clue about what was playing during that time. I was not brought up to hi-jack threads and I do apologize.

Hello, I have just installed a Playbar, bought direct from Sonos. Suffering with a constant high pitch squeal, when the volume is up or not. I've tried powering down, and re-plugging all cables. Diagnostic number is - 4076604. Please help!
Hi, thanks for the diagnostic. I see you already have an incident open with our support team. They'll follow up via email with you.

Thanks

Same thing here, high pitch sound from my new soundbar... =(

Diagnostics: 4228064

just got a new playbar directly from Sonos
it also has the high pitch noise wich is defintly comming from the powersupply.
diag : 
Hi Rob,

For this it'd be best to give us a call on our Support Line to work with a technician live. You can find our contact information here.

Thanks

just got a new playbar directly from Sonos
it also has the high pitch noise wich is defintly comming from the powersupply.
diag : 
thx, i will contact them tommorow 

Same issue here. Have had the Sonos about 2 years, worked fine for 18 months, have just moved house and set it up again and makes high frequency noise. Any chance of a fix or is this simply a hardware issue?

Likewise, diagnostics 4445843. New speaker arrived yesterday and been making the noise from the start. Have had to unplug it. What do you recommend?

Likewise, diagnostics 4445843. New speaker arrived yesterday and been making the noise from the start. Have had to unplug it. What do you recommend?
No response from Sonos on here, so I called customer services as suggested above- the best thing to do for anyone else with the same problem.

Likewise, diagnostics 4445843. New speaker arrived yesterday and been making the noise from the start. Have had to unplug it. What do you recommend?
I'm sure they missed as you posted at the end of a 3 week old thread.