If the LED is green chances are good that it's there and active, we just don't know the correct IP. Just to check the box, can you turn the hub over and push the network reset button for about 7 seconds to see if that will help.
If its plugged into ethernet it wont start the setup AP on the Wifi.
Also, if it has nothing connected at all the LED would flash red/green.
Try the network reset as suggested, see if it helps. You have to hold that button for 10 seconds then let go, LED will flash blue and then the hub will reboot.