A:Answer Hi Trekker84 - On our 2021 QN90A TV, CEC must be turned on for ARC/eARC to work. On the QN90A, “HDMI In 3” supports eARC. The ports are labeled on the back of the TV. So we can better assist you in troubleshooting the connectivity issues you are experiencing with your 2019 Samsung TV & Soundbar, please reach out to Samsung Support at: 1-800-SAMSUNG (ask for TVs), available 8AM -12AM EST, 7 days a week, text HELP to 62913, LiveChat on Samsung.com, or Email: https://www.samsung.com/us/support/#contact_us_for_support ^Gina