If your machine’s controller is not turning on, make sure the machine is connected to power and the circuit breaker (if equipped) is turned on. Then unplug your machine and make sure that the lamps are securely seated in the lamp holders. If only some of the lamps are not working, swap them with the ones that are working. If the lamp(s) won’t work at all, you may have a bad lamp(s) and should contact technical support.