Plug the external AC power adapter (typically 9V or 12V) into the hub's power jack, then into a wall outlet.
If only one device works, try power-cycling the hub by unplugging it for 10 seconds. Linksys Network Hub Nh1005 Manual Pdf txt
The hub's auto-sensing ports allow you to mix 10Mbps and 100Mbps hardware seamlessly. Plug the external AC power adapter (typically 9V