Hi! Try changing the TV’s audio output to PCM or Dolby Digital. (For a Samsung TV: Home → Settings → Sound → Expert Settings → Digital Output Audio Format). Also, HDMI-CEC may not be activated on the TV. Turn on the CEC on the TV menu. (Samsung TV: Home > Settings > General > External Device Manager > Anynet+ (HDMI-CEC) ON). If the issue still persists, Check whether the HDMI cable is correctly connected to the ARC terminal or try a different HDMI cable. Should you need additional assistance, please reach out to Samsung Support at: 1-800-SAMSUNG, available 8AM - 12AM EST, 7 days a week, or Chat with us on Samsung.com: https://www.samsung.com/us/support/contact/ ^Tim