Hey guys, I have been having this problem for a few months now, and after a TON of troubleshooting and research, I have finally come up with a definitive solution.
So, I had originally purchased this 32 inch UN32J5500AF TV from Best Buy. It worked perfectly at first, but I had it mounted to the wall, and my component inputs got bent up and ruined. So I took it to Best Buy, and since I purchased the insurance, it was covered. They sent it in for repair, and when it came back, it had a whole new motherboard in it (go figure).
There was no flashy setup intro like there was the first time. It was pretty much good to go, or so I thought. Later, I Went to access the smart hub features, and found that I had to go through the smart hub setup. That's when I ran into this dreaded issue. I was stuck downloading the terms and conditions for hours.
I set up a network monitoring tool to see if there was actually any downloading going on, and found the TV wasn't doing anything at all. I tried several different internet connections. Mine, friends house, neighbors, cell phone hotspot. Same issue on every connection. I went in to menu, support, self diagnosis, Smart Hub Connection Test. It went though the test up until the last step "Samsung apps connection" which it failed.
I tried changing the DNS settings, resetting Smart Hub, nothing worked. I called Samsung support, and they said since I had the device repaired by Best Buy (even though best buy sent it to Samsung) I would have to bring it back to Best Buy to get the unit fixed.
So.. back to digging on the internet for more info... Guess what, there's a secret menu. YEP!
The procedure to get into this secret menu is.. Turn off the TV so it goes into standby mode. Then, quickly press the buttons on the remote in this order.
Mute + 1 + 8 + 2 + Power
Wait a few seconds, the TV will turn on, wait a few more seconds, up to 30 seconds. It should pop up. If not, try the code again. If that code doesn't work, try the other codes listed on this site: http://www.askvg.com/secret-service-codes-for-sony-and-lg-tv/
When the menu pops up, you will have "Option" selected. Press the right arrow button, you will see "Factory Reset" press the select button, and the TV should power off.
When you turn it back on, it will be like you just turned it on for the first time after unboxing it from the store. You will see the fancy initial startup animation, go through the initial setup, and service agreement will pop up with no downloading required, Smart Hub will be set up, VIOLA!!! Your Smart TV is now SMART AGAIN!!!