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Adjust the screen settings on the spectrum box here is a link I hope helps https://www.spectrum.net/support/tv/hdtv-picture-formats/
Sorry, there was a problem. Please try again later.Make sure that the LG 50 inch Class 4K Smart UHD TV w/AI ThinQ® (49.5'' Diag), Model # 50UM7300PUA is connected to your Set-Top box via its HDMI Out and then you will need to access the settings for your Set-Top box and make sure it is set to output a 16:9 Aspect Ratio. When you switch to the HDMI Input on the TV that you Set-Top box is connected to, the picture will fill the whole screen on the TV...^IFV
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