Spock: Live long and prosper.
Capt. Kirk: Space, the final frontier. These are the voyages of the starship Enterprise. Its 5-year mission: to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before.
Dr. McCoy: He's dead, Jim.
Answer: After causing Norman to overload, all of the other androids shut down. The same could be said for the androids on the Enterprise.