Hello,
I see you’re new. I’m going to move your post to it’s own thread so it gets the attention it deserves.
Are you working with a newer K40 variant? Some of the earlier K40 laser engravers won’t communicate with LightBurn. We need to know more.
Please start by reviewing the following. (Click the Blue Title below.) It may offer some perspective to help us move forward with this:
The alarm and error messages are all different. To help sort through the alarm and error messages, you may find it helpful to Screenshot the Console window in LightBurn. You can also Select and Copy text from the Console window (in LightBurn) and paste it into a reply here.