Priors are on the web, so read https://community.sony.com/t5/Television-General/When-turning-on-TV-and-changing-channels-there-appears-in-the/td-p/170025
Since it's a Samsung, use 1800SAMSUNG in the USA or the Chat at samsung.com
But why isn't the seller talking to you? What has happened to our stores? Are they hitting new lows in service (from what I'm seeing, yes.)
I just bought a Samsung UHDTV 6300. When I change channels on the tv a picture of a modem appears and has an exclamation mark. What does this mean?