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Hello there, Thom. Thank you for reaching out with your inquiry regarding the 43UA7000PUB TV. We understand your question about its compatibility with Spectrum boxes. The LG 43 Class UA7000 Series LED AI 4K UHD Smart webOS TV, model 43UA7000PUB, is designed to connect easily with external cable and set-top boxes, including those from Spectrum, using an HDMI cable. The TV has three HDMI inputs, which allow you to connect your Spectrum box and access your cable channels by selecting the corresponding HDMI input source on your TV. Basic Troubleshooting Step: To connect your Spectrum box to your TV, simply plug one end of an HDMI cable into the HDMI output port on your Spectrum box and the other end into any of the three HDMI input ports on the back of your LG 43UA7000PUB TV. Once connected, turn on both devices and use your LG TV remote's Input/Source button to select the correct HDMI port (e.g., HDMI 1, HDMI 2, or HDMI 3). https://www.bestbuy.com/product/lg-43-class-ua7000-series-led-ai-4k-uhd-smart-webos-tv-2025/JJ8VPZW5KG If you have any further questions about the setup process, or if you encounter any difficulties once connected, please send us a private message on Social Media @LGUSSupport, and our team will be more than happy to assist you. —Renzo
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