You're exactly right, and we received a Service Bulletin stating that exact fact. Also, since it's till on Premier models, I've personally sent back at least half a dozen locomotives that were dropped off as non-functional after flipping the switch and reviving them.
I couldn't count the number of service calls I went out on where the repair consisted of flipping the circuit breaker(s) back on. And some where what I did was either plug the thing in or turn on the water. We humans iz easily forgetful.