Problem
LightBurn cannot connect to the K40 Pro.
Solution
Install the correct CH340/CH341 USB driver, choose the correct COM port, and avoid USB hubs. Import Monport's LightBurn device profile if available.
K40 Pro 40W LightBurn-Ready troubleshooting from the Monport laser FAQ.
LightBurn cannot connect to the K40 Pro.
Install the correct CH340/CH341 USB driver, choose the correct COM port, and avoid USB hubs. Import Monport's LightBurn device profile if available.