Polk Magnifi One Auto Shuts Down

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Polk Magnifi One Auto Shuts Down

Hello- I have a Polk Magnifi One sound bar model: AM8120011736870. It seems have worked fine until now when it auto shuts down!!! (UNBELIEVABLE) It’s hooked up to the TV using optical cable. I have to reset the sound bar to have it work again but after 10 minutes it still auto shut down. I'M desperate!

What will be the resolution to this problem? Thanks for your help.