![K40 laser still experiencing problems with proper cutting and engraving, as well as stepper motor config issues - Smoothieware - LightBurn Software Forum K40 laser still experiencing problems with proper cutting and engraving, as well as stepper motor config issues - Smoothieware - LightBurn Software Forum](https://forum.lightburnsoftware.com/uploads/default/original/2X/e/ec44bb3294802966d3c071feae1a17683fcf31ed.jpeg)
K40 laser still experiencing problems with proper cutting and engraving, as well as stepper motor config issues - Smoothieware - LightBurn Software Forum
![K40 Laser fires at power on after installing C3D board - Hardware Installation - Cohesion3D Community K40 Laser fires at power on after installing C3D board - Hardware Installation - Cohesion3D Community](https://forum.cohesion3d.com/uploads/default/optimized/2X/9/9fd023d6b6b6dd80e6ad3a69b90a5f5ab5c47717_2_1024x768.jpeg)
K40 Laser fires at power on after installing C3D board - Hardware Installation - Cohesion3D Community
![K40 laser won't fire, when I press the test button I hear a fzzz sound. Everything else works. How to test if the psu or the tube is broken? : r/ChineseLaserCutters K40 laser won't fire, when I press the test button I hear a fzzz sound. Everything else works. How to test if the psu or the tube is broken? : r/ChineseLaserCutters](https://external-preview.redd.it/NKhUUzcZjUhIRM5zSx0aOWKDwp-ee_VgOxK5q6w-Wc0.png?width=640&crop=smart&format=pjpg&auto=webp&s=0ada24985f0788bbba0c319ff39943ce7a86d2fc)
K40 laser won't fire, when I press the test button I hear a fzzz sound. Everything else works. How to test if the psu or the tube is broken? : r/ChineseLaserCutters
![K40 Laser fires at power on after installing C3D board - Hardware Installation - Cohesion3D Community K40 Laser fires at power on after installing C3D board - Hardware Installation - Cohesion3D Community](https://forum.cohesion3d.com/uploads/default/original/2X/7/7e32779560dfba4e4ec18bc22ef6242550b18fff.jpeg)