Ok, that seems to hit something there.
go to menu>setup>systemsetup>networksetup
Then hit restore defaults. Make sure you don't hook this back up to the ethernet cable. It won't let your MRV work.
If this didn't resolve your issue, I would give it a red button reset and then check everything.
I reset the network settings to their default (ethernet has been/is still unplugged). Still getting the same diagnostic error.
Reset the receiver with the red button. Still getting the same diagnostic error.