FREE Fix for Ender 3 S1 Laser Engraver Not Working | 3D Printer by Creality 

Thank you, MokiTin ❤️

It's certainly a shame because their technology is quite good otherwise. They really could dominate the budget consumer 3D printer marketplace with a couple strategic board modifications. I appreciate the thoughtful comment, farpsy.

Their support was actually quite helpful over email. Describe your problem to them. They may have you check a couple readings with your multimeter to diagnose if it is a dead laser versus motherboard. If still under warranty, they'll hook you up.

Yes, laser head safely can be used again after the board has been swapped.

@@VestigialVoice Unfortunately, the laser head that I bought with excitement gave me a very bad experience. When I measured with a multimeter from the laser output port on the device, I measured 24 volts between vcc and pwm, and it showed 0 volts between gnd and vcc. As a printer manufacturing defect, the output ports were in the wrong order, so my device was damaged. I'm not sure if the laser head was damaged. and my printer's warranty has expired, I need to buy a new motherboard and I don't dare to use the laser head again.