# Problem with Lightburn and 2.0 with 40W Module **URL:** \ **Category:** Snapmaker2.0 Troubleshooting guides\ **Tags:** Lightburn, Laser, Tips\ **Created:** [February 19, 2024, 8:05am UTC](https://forum.snapmaker.com/t/problem-with-lightburn-and-2-0-with-40w-module/34995 "2024-02-19T08:05:14Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![DKH666](https://avatars.discourse-cdn.com/v4/letter/d/e47774/32.png) [@DKH666](https://forum.snapmaker.com/u/DKH666)\ **Post date:** [February 19, 2024, 8:05am UTC](https://forum.snapmaker.com/t/problem-with-lightburn-and-2-0-with-40w-module/34995/1 "2024-02-19T08:05:14Z")
Hello, I have a problem with my Snapmaker 2.0 and Lightburn. I can connect and control everything via USB, but after the first contour has been cut, the laser switches off and moves to the next contour without a laser beam. ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [February 19, 2024, 7:29pm UTC](https://forum.snapmaker.com/t/problem-with-lightburn-and-2-0-with-40w-module/34995/2 "2024-02-19T19:29:32Z")
This seems a lightburn problem. Is it turned on in the gcode on the second contour? Maybe this guide helps: > [@Full Lightburn Control Guide](https://forum.snapmaker.com/t/full-lightburn-control-guide/27638): > > So… After a lot of testing… It’s been awhile since I’ve done a guide, and this one was a long time coming. This guide will allow you to do your entire project in Lightburn, and (if connected via USB) run it directly from Lightburn. Letting you skip Luban or using the USB drive entirely. A quick note, this guide, like most of mine, will assume you have some experience with the machine. As always, feel free to ask questions and I’ll try filling in any gaps you find. I’ll be posting the setup I u… ---
**Author:** ![Kappy79](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/kappy79/32/9309_2.png) [@Kappy79](https://forum.snapmaker.com/u/Kappy79)\ **Post date:** [February 20, 2024, 1:19am UTC](https://forum.snapmaker.com/t/problem-with-lightburn-and-2-0-with-40w-module/34995/3 "2024-02-20T01:19:32Z")
When I updated lightburn to 1.5, I could control everything normally with the move controls and even the fire button, but when I hit start, it would just sit there and nothing would happen. I had an install file for 1.4.05 so I put that back on and everything worked with out issue. Something they did when they updated the app messed up the communication. If I get a chance to find a better solution, I will post it, but that was my temporary solution. ---
**Author:** ![Fabian997](https://avatars.discourse-cdn.com/v4/letter/f/ee7513/32.png) [@Fabian997](https://forum.snapmaker.com/u/Fabian997)\ **Post date:** [March 3, 2024, 12:08pm UTC](https://forum.snapmaker.com/t/problem-with-lightburn-and-2-0-with-40w-module/34995/4 "2024-03-03T12:08:36Z")
I have the same problem. 😭 ---
**Author:** ![Boxkite](https://avatars.discourse-cdn.com/v4/letter/b/df705f/32.png) [@Boxkite](https://forum.snapmaker.com/u/Boxkite)\ **Post date:** [March 3, 2024, 8:57pm UTC](https://forum.snapmaker.com/t/problem-with-lightburn-and-2-0-with-40w-module/34995/5 "2024-03-03T20:57:46Z")
Maybe this will help: > [@Full Lightburn Control Guide](https://forum.snapmaker.com/t/full-lightburn-control-guide/27638/439): > > Hi Everyone! LightBurn chiming in here. It appears that with a recent firmware update, all Snapmaker devices (not the Ray, which already was GRBL) now present as GRBL devices, rather than Marlin. This has the lovely benefit of breaking comms with LightBurn until a new device is created. Any Snapmaker devices currently using the Snapmaker Device Profile or Marlin device profile in LightBurn will no longer work after this firmware update. LightBurn users need to be especially aware that if you w… ---
**Author:** ![darien](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/darien/32/14938_2.png) [@darien](https://forum.snapmaker.com/u/darien)\ **Post date:** [March 5, 2024, 6:47am UTC](https://forum.snapmaker.com/t/problem-with-lightburn-and-2-0-with-40w-module/34995/6 "2024-03-05T06:47:44Z")
I was also experiencing the laser power dropping to 0 after the first path(s). In Lightburn, Device Settings, GCode panel, enable the option “Emit S value with every G1 command” and you’ll be operational again. ![cap_3466](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/3X/a/7/a7905ae91ba057144154343934c336cc96293a02.png) ---
**Author:** ![Fabian997](https://avatars.discourse-cdn.com/v4/letter/f/ee7513/32.png) [@Fabian997](https://forum.snapmaker.com/u/Fabian997)\ **Post date:** [March 8, 2024, 5:38am UTC](https://forum.snapmaker.com/t/problem-with-lightburn-and-2-0-with-40w-module/34995/7 "2024-03-08T05:38:49Z")
I will test it. Thank you so much. Snapmaker Support wasn’t helpful ---
**Author:** ![Fabian997](https://avatars.discourse-cdn.com/v4/letter/f/ee7513/32.png) [@Fabian997](https://forum.snapmaker.com/u/Fabian997)\ **Post date:** [March 8, 2024, 7:19am UTC](https://forum.snapmaker.com/t/problem-with-lightburn-and-2-0-with-40w-module/34995/8 "2024-03-08T07:19:08Z")
Problem is solved😊 ---
**Author:** ![DKH666](https://avatars.discourse-cdn.com/v4/letter/d/e47774/32.png) [@DKH666](https://forum.snapmaker.com/u/DKH666)\ **Post date:** [March 8, 2024, 4:05pm UTC](https://forum.snapmaker.com/t/problem-with-lightburn-and-2-0-with-40w-module/34995/9 "2024-03-08T16:05:11Z")
Thank you very much!