I have a new Airport extreme model A1408 but my Airport utility version 6.1 can not detect it. It just giving me the blinking yellow light for the last 1 hour. I was told by apple tech support that they need to install a network driver but for them to do that they told me that I have to have a software support plan, something like $99/year. I said forget it and I will just return the device. I have hard reset the device and it is still doing the same thing. I even tried detecting it using my Ipad, Iphone 5, and MBpro, but none of them can detect it. i also have connected the airport extreme to my imac thru an ethernet cable and still it could not be detected. next step i did was to connect the extreme to my windows 7 machine via ethernet cable and could not detect as well. So this leads me to believe that the device is defective, or I maybe wrong. So that's why I'm here, to see if there is anything else I should do before I ask for a replacement.