Update: 
Tried again this morning. This time I used a wall adapter with a power rating of 2.4A, yesterday I used one with 1.4A. My test was done without router - a direct connection from Verizon Fios modem to DC nano to laptop.
 
Results. Internet worked. Successful connection to DC Nano admin dashboard.
 
Will try previous setup again - including router, with higher powered wall adapter.