I have a Samsung series 7 smart TV. It connects through the wireless option but refuse to connect via the Ethernet cable. I did check that it was properly inserted in the TV and modem. I also tested the cable via the home theater system and it is working. But when I set it up to connect to the TV it says the Ethernet cable is not connected. It used to work before for more than a year. We went away for a few weeks, and pulled out the tv plug so I don't know if that could have something to do with this? I also got a new modem, is there perhaps some settings in the modem I have to change? It is a TP-Link modem. Any suggestions in normal non IT professional language would be highly appreciated!