Greetings from the Frozen Republic of West Cambridge (MA), Jan
The power supply (PS) for the AEBS was to be delivered on Saturday (6/2/16), but the weather did not cooperate!
But the PS did arrive on Monday (8/2/16).
I tested the PS with a digital multi-meter before using with AEBS. Voltage is a little over 5V DC & the amperage is a little over 2A.
The AEBS appears to be getting enough power and is operating, i.e., lights up.
Initially, I tried to configure the AEBS via Wi-Fi with the MacMini on 8/2/16, No Soap!
Earlier today (10/2/16), I connected the AEBS to the router with a 50 foot cable (Router: LAN; AEBS: WAN). Still, No Soap!
Next, I connected the AEBS to the Ethernet hub (MacMini/AEBS) & Signs of Life!
I have used either the WAN and/or LAN port on the AEBS. Should I use one over the other when configuring the AEBS?
Do I need to have the AEBS connected to the router via the WAN/LAN port to configure the AEBS?
Both AirPort Utility (5.6.1) & AirPort Extreme Firmware Updater (5.7) "see" the AEBS, but I keep getting errors when trying to do anything with the AEBS.
The reset button on the AEBS has been used, both with a short & a longer duration as suggested by the documentation/manual. Still, No Soap!
I have taken a number of screen shots showing the results from AirPort Utility & AirPort Extreme Firmware Updater.
Maybe these screen shots could help you (Jan) with trying to figure out what is going on with the AEBS?
I am a little lost @ this point, Jan. I hope you can help, Jan. Jan, if this a little beyond your expertise maybe Grant could help.
Either way, Jan, Thank You for your time, James 



