On the tv, when you enter the wifi password, is there any message? The password has lower case characters.
Does the tv have a factory reset function? Using this would clear channel selection list and maybe other settings.
Regarding speed, do you have a computer you can connect by cable to router? This is the best test for
speed. And without other devices doing anything. On a 50/20 plan, typical evening speed is 45Mbps.
What device did you run the speed test on?
