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Hi there, Nelly. Thanks for reaching out about your LG TV (55UA7050PUB). The HDMI ARC port on this model is located on the back panel of the TV and is labeled “HDMI ARC” or “HDMI (ARC/eARC)” depending on the revision. It will be one of the HDMI inputs grouped together on the rear connection panel. You can also review the full port layout in the product support section here, also images are displayed on website: https://www.bestbuy.com/product/lg-55-class-ua7050-series-led-ai-4k-uhd-smart-webos-tv-2025/JJ8VPZKYK4. If you’d like help identifying the exact port on your unit, feel free to email us at [email protected] for further assistance. - Avril
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