That's a new one. Have you confirmed that, disregarding what the status says, that networking doesn't work? Also, try swapping a different ethernet cable. Also restart the router and make sure there are no IP conflicts on the LAN. (Sometimes it's the stupidest stuff.)
Also I would ask the Q here, where a lot more V75 users will see it: http://www.avsforum.com/t/1465259/yamaha-rx-v-75-series-owners-thread/700_50#post_24307398
Also I would ask the Q here, where a lot more V75 users will see it: http://www.avsforum.com/t/1465259/yamaha-rx-v-75-series-owners-thread/700_50#post_24307398