Which model OBi is this? Which firmware file did you use to update it? If this is an OBi 100 or 110, is the left-most LED alternating red and green?
It sounds bricked to me, but if it isn't blinking red/green, then you could try taking it to a friend, relative or neighbor's home, plug it into their router or switch, and see if the symptom changes. Also try swapping out the Ethernet cable, just for the heck of it, and make sure it is securely seated in the jacks at both ends.
If you can't get it to speak the IP address when pressing ***1, after trying it with another network, then it's likely dead, or at least, has corrupted firmware.