Laser Engraver Failing to Fire

To confirm the laser failure, verify the laser module's status during operation. If the laser fan remains stationary when the machine is powered, the module is not receiving primary power. If the fan spins but the laser diode does not emit light, check for a missing PWM signal. Confirm the issue by sending an 'M3 S255' command while the controller is unlocked (using '$X'). If the laser does not fire despite these commands, the system is failing to bridge the gap between firmware instructions and hardware execution.