We have 5 tv's in the house all with Xfinity boxes. Only one tv is having the pixelation issue. I switched boxes with another tv to see if that would change it. The tv worked for one day and now it is doing it again. I've checked the connections. Any more suggestions?
lol - sorry, misread the email. There are no splitters and all tv cables come from wall.
You tried changing the TV Boxes and found that didn't help. Try changing the cables from the wall jack to the TV to see if the problem follows the cable or stays with the wall jack.