I'm using a 2wire 2701HG-B wirless router/dsl modem combo. My computer is a Win 7 Ultimate 64bit. The router/modem has been reliable for the last 2 years.. hardly ever needing a reset, reboot, or anything. Then all of a sudden my wifi network didn't show up anymore. I did a reboot, nothing. Kind of weird so I got on the phone with AT&T and they walked me through some simple stuff and they determined it's either the router or my computer. Well I know it's not the computer, I can use the mobile hotspot on my android phone and it gets on just fine.
All of the lights on the router are green, AT&T showed that all the tests show the internet connection is working. Since the router is not sending out a wifi signal anymore, I had to plug the ethernet cable in. The system recognizes a connection but says it isn't connected because it is a "public" connection. Additionally, if I go to network connections with the cable plugged in, I can see my DirecTV DVR is showing on the network (because it is connected to the router via ethernet too).
So it isn't broadcasting wifi, I can see my DVR over the network in windows, but I can't get the IP renewed.