Right, a little more info would help. As keepLearning said, assuming this is for the 2016 model? I'm also assuming when you say "dropped internet" you mean the Apex isn't connected to Fusion.
When you connect via ethernet it might take ~5 minutes or so for the Apex to pull a new IP address then connect to Fusion. Are you able to reach apex.local interface when the Apex is connected via ethernet?