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I had a similar problem. Best Buy sold me an out-of-the-box sound bar which always went to 25 after about 2 minutes. If my initial volume was lower, it would go up to 25. If the initial volume was higher, it would go down to 25. I called Samsung tech support and they were very helpful. They led me through various diagnostics and decided I would have to send it to their repair center. I had to pay to ship it to the repair center. They wanted everything including the subwoofer so it cost me about $75. Samsung replaced the PCB board and sent everything back and it all works perfectlly! Even though I bought the sound bar 2 weeks earlier, Samsung initially said the unit was purchased over a year ago and was out of warranty. I had to send them a receipt and they covered everything under warranty. Best Buy sold me a broken sound bar and they also sold me the wrong HDMI arc cable. Samsung told me to buy a 2.1 version which I did. I was very impressed with Samsung!
Sorry, there was a problem. Please try again later.I had this same problem with an out of box purchase. I just did a hard reset which I googled how to do and no longer had the volume issue.
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