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While I dont have a solution I was experiencing the same thing where sound wasnt getting fed to sound bar and it fixed itself after a power outage. So maybe try disconnecting the power? I hope that helps.
Sorry, there was a problem. Please try again later.The AV (red and white) ports are inputs (not outputs). Try to use the Insignia - 6' Stereo Audio RCA Cable - Black - Model: NS-HZ533 For product support, please visit https://www.insigniaproducts.com/email-us
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