I recently purchased a Samsung Smart TV 8 Series. When I try connecting it to the internet by LAN/WAN it says connected to router but not able to connect to internet, contact your ISP. Sometimes it connects and then goes to the previous status in a short time. I am using a Leoxsys 54 g-dl 54madsl2+router and I have a bsnl ul750 plan. Both Samsung and bsnl tell me its not a problem on their side. I am able to access internet on other devices through the same plan. I have tried using an alternate dns server.