Sounds EXACTLY like what happened with mine. I hope you are still within warranty. I do not think they ship boxes to return the console to them anymore, but you will still want to call and speak with them. You're likely to see the RROD if the console sees continued use (and depending on how MS handles it, may need to force those lights)

I would say my experience with the whole thing was positive, outside of necessitating repair in the first place.