If you kill/stop the mce process more than (rough estimate) 4 times in approx 2 minutes the service doesn't restart. You're best off using something like Code: initctl stop mce; sleep 2; initctl start mce because it gives feedback - so will tell you if it hasn't been able to start or stop it. I've also put a guide to the n900 led patterns here in case anyone wants to play around further with colours etc.
initctl stop mce; sleep 2; initctl start mce