[Cow Bell Solo]

We also somewhat had a similar problem, first if you just turned on the main breaker, what a bit to check if it still says "no comm" the cRIO has to startup. If it still says that check all of your connections, are you using the right ethernet cables in the right spots. If you get a voltage, and you get a voltage of "0" but you know that is not true(this was what was happening with us), we ended up needing to reimage the cRIO(especially since LabVIEW update 3). That is my two bits of advice. Also for next time if possible add some pictures, pictures help so we can see your wiring and other stuff instead of just having to make lots of random guesses.