After purchasing our 3rd smart TV which is in the dining room, all tv's, now based in different rooms, have picture fragmentation most of the time. I bought an AC750 dual band booster but this has not helped at all. What can we do to sort the problem?
Does one of the smart TVs have a RJ45 Ethernet port that you could cable to the router via a very long Ethernet cable to check if the problem is solved?
Does the fragmentation definitely occur when streaming from the internet, and it's not a terrestrial TV picture which is fragmenting?
I haven't in recent memory seen any picture fragmentation over WiFi even on a very poor 4G LTE connection. Such fragmentation is an indication of transmission errors which points the finger at your booster which I would suggest to turn off to see if it helps the devices nearest the router.
