My Genie (HR34) has a USB port on the front panel behind a little door. I thought this might be a good way to connect my Nexus tablet so I could watch or stream internet shows. The problem is I can't find anywhere in the software an option where I can switch over to this USB port. Is there a way to do this? I did connect my tablet, but it didn't do a thing. What else would this port be used for?