1. Be sure the date and time is correct in both router and TV.
2. Be sure the TV has it's latest FIRMWARE. Factory reset after the firmware update or when the TV is befuddled like this.
Remember no one is going to fix these issues. If you need a smarter TV go get a Roku or Amazon Fire TV stick or box.
I have a problem very similar to one posted by "lolsociety" on 8/21/2013. Tried the suggestion of using FFWD 289 REW, but SmartHub just displays a "Loading" message and doesn't respond after that.
I use Comcast/Xfinity service with their modem, model Technicolor TC8305C.
The TV model is UN40EH5300, as in the title. The problem may have started when I changed from a Linksys router to the Comcast one, but I don't know for sure.
I'm connected to the internet per the TV, and I see the TV from my PC and the router. However, I cannot open the web browser nor the Samsung apps from the SmartHub. Accuweather works, however.
Any suggestions? Do I need to do port forwarding on the router?
Oh and btw, I've tried changing DNS to 220.127.116.11 per other suggestions; that hasn't helped either.