Discovered this while trying to set up a wifi extender. PC has only one enet port. Couldn't get extender to pair with router via wifi so I connected to the extender direct to the PC with an enet cable. When the cable is disconnected from the router and connected to the extender the screen goes blank (network connection lost?) and stays that way until the router is reconnected. Also couldn't see the extender by hooking it into one of the three open enet ports Extender is now configured but I'd still like to know what's going on with this blanking. I'm hoping this just a setting/switch somewhere. Thanks!