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I had the same issue! In your settings bar on your tv go all the way to the right where there is a little speaker icon. It should say something like automatically choose or something else (I don't remember the exact phrase because it was on my mom's tv and not mine). But when you click on it, it will change to PCM which is what this sound bar needs to work over an optical cable.
Sorry, there was a problem. Please try again later.Try to change the Audio Format to PCM on your TV. For personalized assistance, please visit https://www.insigniaproducts.com/email-us
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