the USB cable was not included, but i had another one. This should not be an issue I suppose
i think he was referring to cables inside the unit. last time i saw pictures of a minirig interior, wiring was a mess of hotglue, zipties, electrical tape, and velcro tape. im hoping they are improved since, but its possible an internal power or usb cable popped free.
when you plug it in and turn it on, what happens? are the fans spinning, nexus turning on, heat being produced, etc? there are a hundred different reasons why it might not connect, but with a little more info it can be narrowed down to 5 or fewer