I have a Panasonic Viera TC-P50ST50 and a D-Link DIR-615 router. This TV is actually a replacement for an identical model that was originally delivered. TV #1 would not connect to my wireless network reliably, so I returned it for a replacement. TV #2 connected okay when I went through the setup, and it continued to connect okay for a few days, but now it won’t connect. I just tried cycling the power of the router, as has been suggested, and this time the TV connected. That was promising. But then I turned the TV off and back on, and it wouldn’t connect. So I shut the TV off, power cycled the router again, and turned the TV back on. This time the TV would not connect. Power cycling the router does not seem to be a solution. I think the problem is with the TV. All the other devices in my house (two computers, two iPhones, a printer, and an Apple TV) connect to the wireless network without any problems.