The same dreaded problem for Series 6 UA40J6200AW.
I have rung help desk & a reset was done. I also reset SmartHub. None of these fixes worked. I have Internet access via TV but cannot search using Web Browser. In the IP Settings it shows:-
I formally had it to find automatically but that wasn't working.
There seems to be many TV'S with this problem. This will put me off making another Samsung purchase.