I just downloaded 9.20 lightburn, have everything set up. Went to do a test on 3mm birch wood. Head moves, but the laser isn’t firing. When I press the test button on the K40 no issues.
I made sure there was no loose wire, all connects are snug. I am using a cohesion3d mini.
There’s no magic here, so it’s possible there’s a bad wire or connection between the board and the power supply. I’d suggest contacting C3D to see if they have troubleshooting tips for you - I honestly haven’t had to troubleshoot mine, as it just worked first try.