I bought a used apex unit and I'm have trouble with the initial setup. I had no doubt that I would need a little help setting it up but I cant get past the third step. I plug in as directed, ethernet first, then plug eba8 into outlet, then aquabus from eb8 to head unit. The flashing amber light on the head unit goes green but the eb8 continues to flash. I have 2 eb8s and both do the same. What could be the problem. Did I buy lemon?

