If the aforementioned hasn't worked for you, try popping off the cover and check that the network card inside is properly seated. I've found this to be the source of problems for more than a few others including one unit I resold that was working before shipment.
Cheers, where abouts is this located ?? Sorry, i am new to this.
It is located on the beaglebone at the back (or is it the front?) of the miner. Are you able to open the case? -a torx (star-shaped) screwdriver is needed. Just apply a bit of pressure to the card to assure it is sitting properly.