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If the LG sound bar supports HDMI you should be able to connect the sound bar. The Samsung TV supports eARC, as well as Optical. You will need to go to the TV’s main menu, Sound > Sound Output and select the sound bar option. Then under Expert Settings > HDMI-eARC Mode set to ON. Then select the other options that your sound bar may support. (Note: your sound bar does not support Dolby Atmos). Hope this helps.
Sorry, there was a problem. Please try again later.It should.. tv has optical and earc outputs
Sorry, there was a problem. Please try again later.Al - The QN90B TV features HDMI and Optical ports, as well as wireless Bluetooth and Wi-Fi connectivity; if your existing soundbar uses any of these connection types, you sure can connect it to the QN90B! ~ Samsung Specialist
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