i have had the same issue not only on cyan but on other colours as well. What i found fixed this issue is to remove the dev unit affected and then re initialise the unit again entering into service mode and telling the mach its getting a new dev unit in your case cyan. Simply removing it and re seating it wont really do anything. Try it like i said this fixed it for me. As for clearing nvram, good luck. unless you know exactly what you are doing you will most likely create more probs