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Make sure your cable is secure in back. If its not it can unplug and turn tv off or try moving your cable input to a different source.
Sorry, there was a problem. Please try again later.Hi, When connecting the HDMI cable, the product and external devices should be turned off and unplugged.If the device connected to Input Port also supports HDMI Deep Color, your picture may be clearer. However, if the device doesn’t support it, it may not work properly. In that case, change the TV’s [HDMI Deep Color] setting to off. Here's the manual for connectivity https://www.lg.com/us/support/manuals-documents?customerModelCode=43UQ7590PUB&csSalesCode=43UQ7590PUB.AUS&category=CT10000018&subcategory=CT32016662. ^Vanessa
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