‘Invisible’ Star

Afternoon all
I recently moved home and have now connected up my kit - RP3, Rega Phono, Rega Power Supply, Uniti Star, Uniti Serve into SBLs. The Star and Serve are connected to the router with CAT6 cable and my Mac Mini sits on the same network upstairs. Initially, all worked fine.
After a power outage last week i powered everything down, restarted and all was good - except I can’t ‘see’ the Star on the Mac - I can see the Netgear Nas, the ‘Serve, but not the Star.
Powered down, restarted to no avail.
Is it me?