Just bought the Deco 6e three pack.

Connecting an Ethernet cable from any of the three Deco to the cable router works and provides WiFi connection to the Internet.  However, leaving one Deco connected to the cable modem and taking either of the other Deco to another room and connecting the mesh, still provides WiFi, but none of the Ethernet ports will connect to a PC.  Even ports that worked to provide connection to the cable modem. 

Using 3 different Ethernet cables that all work from the PC to a different router, plugging them in to the Deco the PC reports "No media connected".

Any ideas or suggestions?