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LG 2019 55 uhd tv
I'm having some difficulty connecting my new lg tv to my att uverse set top box. I have the two connected by a new HDMI cable (UHD compatible) and I've tried multiple cables. The TV accurately identifies the box as an att Uverse box and I can get it through regional setup but then the TV can't seem to accurately display the signal. It flashes on and off and occasionally will settle in on a channel but there's no rhyme or reason to when/how this happens. I've reset the TV/ turned everything off an on again. On the plus side the TV flawlessly connects to the WIFI (also att). Any suggestions would be welcome.