Ruckus unleased not working

I admit to being a complete tech novice.  I don't even know what to call all the different pieces of my home wifi set up. Anyway, I had an Xfinity tech come check my wifi, because even though their Gateway modem is functioning, I can't locate or access my wifi network. All my smart home equipment is housed in a special cabinet which includes the Gateway and Ruckus, both of which appear to have power.  There is also a Ruckus unit attached to the ceiling in the middle of my house.  That does not appear to have any power, no lights on at all.  For now, until I can actually have someone replace the Ruckus, can I simply unplug it and use my Gateway modem directly.  Like I said, I know nothing about all this smart home technology, so hopefully my question at least makes some sense.