So I'm trying to set up an Airport Extreme 5G (refurb) that I just got and I'm hitting some issues setting up. I followed the setup in Airport Utility, and the internet connection works fine over wired Ethernet (using it to post here). Oddly enough, even when the internet is working, there is still "Internet Connection" and "No DNS Servers" error messages present. Also, I can not get the wireless connection to work no matter how hard I try. The network shows up, but when my mac/iphone tries to connect it gets hung up. I've done every combination of unplug/reset with the router and modem, as well as resetting the network settings on the devices. I'm kind of lost as to what to try next, Am I missing some network setting in the router? Or could it be that a wireless component wasn't repaired during the refurb process? Any help is greatly appreciated.