Hello people,
Since I moved and plugged my play bar into my Samsung smarttv , it makes a Screeching noise as soon as I power oN. It is not related to the optical , because even if I removed it, the noise persists.
(Sorry for my English)
I hope someone can help me. Thanks 
Sometimes such noises may come from a faulty switched-mode power supply, as built into the Playbar. I would first submit a Sonos system diagnostic and post the reference back here and then contact Sonos Support via phone to discuss the matter with them direct.
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