Laser doesn’t respond to LightBurn

hello everyone, i have laser machine, Sculpfun s9, it was working so great and just couple of days i had engraved a tumbler. then i had to do another project, i connected the laser machine into my computer, it was not responding to LightBurn. whats the reason of that?! please i need help. thank you

Sometimes when I shut everything down lightburn loses connection with the laser. I have to go to the laser tab then at the bottom you will see the USB selection. Hope that helps

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Check the USB connection. Is it still recognized in Windows device manager? Does it get a COM port assigned? Did you select the correct one in LB?

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