Could the other devices be 5ghz wireless N, and the TV only 2.4ghz Wireless N, and if the router is set to 5ghz only, a 2.4ghz will set it, try to connect, but never will.
Could the other devices be 5ghz wireless N, and the TV only 2.4ghz Wireless N, and if the router is set to 5ghz only, a 2.4ghz will set it, try to connect, but never will.