To connect I check the TV date/time is current then with the router at under 20 feet line of sight try again.
Samsung LED TV. Model is: UN40EH5300FXZA. Unable to connect WiFi. Getting Network is not connected. Check Network Settings to use this Service. When I tried to set it up it is not working. It was working fine from past 3 years. Not sure what happened now it is failing to connect WiFi. My Samsung TV Model is: UN40EH5300FXZA. I bought Samsung Wireless LAN Adapter WIS12ABGNX and plugged into USB port. Still unable to connect. It seems this Wireless LAN model not supporting to connect Wifi.
Which wifi dongle supports to connect WiFi to my LED-WiFi enabled TV?

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