I'm having the same EXACT problem except that the unplugging and plugging back in the router and modem didn't work for me. Neither did doing a hard reset on the router. But the weird thing is that I'm sure it's not a problem with the router because I bought the EXACT same router again and the new one doesn't work either. It might be useful to know that the router wouldn't connect right after a storm in my area where all the power went off. Any thoughts/suggestions would be greatly appreciated.