# Help - I can't get the laser to fire anymore **URL:** \ **Category:** Community Laser Talk\ **Tags:** grbl, firmware, creality-cr-falcon\ **Created:** [December 2, 2024, 5:43pm UTC](https://forum.lightburnsoftware.com/t/help-i-cant-get-the-laser-to-fire-anymore/158275 "2024-12-02T17:43:13Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![RedHog](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/r/f19dbf/32.png) [@RedHog](https://forum.lightburnsoftware.com/u/RedHog)\ **Post date:** [December 2, 2024, 5:43pm UTC](https://forum.lightburnsoftware.com/t/help-i-cant-get-the-laser-to-fire-anymore/158275/1 "2024-12-02T17:43:14Z")
Hi all Apologies that my first post on here is a cry for help. I have a Creality laser, a 10w. I’ve had it working previously, but now I can’t get the laser to fire. I can move it around around with Lightburn, Auto home works. The laser fire button will not fire the laser, It will frame the design, but the laser isn’t on and if i start a cut it moves around like it should but the laser isn’t on. I’ve done some reading on here and tried a few things before I asked for help, but no luck yet. results below. Hopefully someone will have some ideas on whats might be going wrong, almost guarantee it’s user error, but I don’t know what I’ve done… - **Connected the laser to a 5w power source** (A Creality S1 Plus printer with a laser controller built in) and the Fan activates as does the laser, and the light on the control board all light up, so fairly convinced the laser itself is OK. - **Flashed the firmware** with the one from Creality website. This version - CV-30-V3\_0\_24\_20221012\_Release. seemed to be successful, all the correct beeps as per instructions. - **When i connect the Laser to lightburn I get this message** e[0;32mI (146838) serial: Line state changed! dtr:0, rst:0e[0m e[0;32mI (146874) serial: Line state changed! dtr:0, rst:0e[0m e[0;32mI (148119) serial: Line state changed! dtr:0, rst:1e[0m ok - **$$ returns the following** $$ $0=10 $1=250 $2=0 $3=7 $4=0 $5=0 $6=0 $10=1 $11=0.010 $12=0.002 $13=0 $20=0 $21=0 $22=1 $23=0 $24=1500.000 $25=4500.000 $26=20 $27=3.000 $30=1000.000 $31=0.000 $32=1 $100=80.000 $101=80.000 $110=6000.000 $111=6000.000 $120=500.000 $121=500.000 $130=400.000 $131=415.000 ok - **$I returns nothing** $I ok - **During Auto home i get the following** e[0;31mE (276155) gpio: gpio\_isr\_handler\_remove(480): GPIO isr service is not installed, call gpio\_install\_isr\_service() firste[0m e[0;31mE (276156) gpio: gpio\_isr\_handler\_remove(480): GPIO isr service is not installed, call gpio\_install\_isr\_service() firste[0m e[0;31mE (276802) gpio: gpio\_isr\_handler\_remove(480): GPIO isr service is not installed, call gpio\_install\_isr\_service() firste[0m e[0;31mE (276803) gpio: gpio\_isr\_handler\_remove(480): GPIO isr service is not installed, call gpio\_install\_isr\_service() firste[0m e[0;31mE (276805) gpio: gpio\_isr\_handler\_remove(480): GPIO isr service is not installed, call gpio\_install\_isr\_service() firste[0m e[0;31mE (276806) gpio: gpio\_isr\_handler\_remove(480): GPIO isr service is not installed, call gpio\_install\_isr\_service() firste[0m ok - **Basic settings** - Latest version of Lightburn - Running on a HP eletebook, with windows 10. - I don’t know what the controller is but it connects using GBRL if that helps. ---
**Author:** ![Dskall](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/d/b5e925/32.png) [@Dskall](https://forum.lightburnsoftware.com/u/Dskall)\ **Post date:** [December 2, 2024, 6:08pm UTC](https://forum.lightburnsoftware.com/t/help-i-cant-get-the-laser-to-fire-anymore/158275/2 "2024-12-02T18:08:59Z")
Sounds like a bad connection or power failure if laser is on it’s own supply. Do lights illuminate on top of laser? ---
**Author:** ![RedHog](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/r/f19dbf/32.png) [@RedHog](https://forum.lightburnsoftware.com/u/RedHog)\ **Post date:** [December 2, 2024, 7:24pm UTC](https://forum.lightburnsoftware.com/t/help-i-cant-get-the-laser-to-fire-anymore/158275/3 "2024-12-02T19:24:04Z")
Hi Dskall I have tried two different cables, and I have a second controller for it and all combinations have the same result. The laser is powered by the controller, when connected to either controller there are no lights on the laser. But I also I tested the laser by applying power from another source, when I do this the light and fan activate on the laser module activate, as well as a low power laser for Framing/locating. Seems odd that both controllers would have the same problem at the same time, which is what’s making me think it’s more software or firmware related. ---
**Author:** ![Dskall](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/d/b5e925/32.png) [@Dskall](https://forum.lightburnsoftware.com/u/Dskall)\ **Post date:** [December 2, 2024, 8:16pm UTC](https://forum.lightburnsoftware.com/t/help-i-cant-get-the-laser-to-fire-anymore/158275/4 "2024-12-02T20:16:04Z")
I would try it with lasergrbl and see if it works. ---
**Author:** ![RedHog](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/r/f19dbf/32.png) [@RedHog](https://forum.lightburnsoftware.com/u/RedHog)\ **Post date:** [December 4, 2024, 8:14pm UTC](https://forum.lightburnsoftware.com/t/help-i-cant-get-the-laser-to-fire-anymore/158275/5 "2024-12-04T20:14:29Z")
Hi, I’ve connected it to LaserGRBL and run a few tests, I get exactly the same result. Basically it will do everything apart from fire the laser ---
**Author:** ![Dskall](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/d/b5e925/32.png) [@Dskall](https://forum.lightburnsoftware.com/u/Dskall)\ **Post date:** [December 4, 2024, 8:44pm UTC](https://forum.lightburnsoftware.com/t/help-i-cant-get-the-laser-to-fire-anymore/158275/6 "2024-12-04T20:44:43Z")
So, it’s not software it’s back to my first post. ---
**Author:** ![jkwilborn](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/jkwilborn/32/63089_2.png) [@jkwilborn](https://forum.lightburnsoftware.com/u/jkwilborn)\ **Post date:** [May 16, 2026, 9:26pm UTC](https://forum.lightburnsoftware.com/t/help-i-cant-get-the-laser-to-fire-anymore/158275/7 "2026-05-16T21:26:48Z")
> [@RedHog](#): > > applying power from another source, when I do this the light and fan activate on the laser module activate, as well as a low power laser for Framing/locating. If the laser works when directly powered, I’d suspect power to the module. Do you have a different color laser for framing as lasing? You really need some type of schematic of the module to make repairs to it.. Without a roadmap it’s a guessing game, might work or you might fry it. You can test the modules power and pwm, at the module or at the control board. if they are correct at the control board, you should see the same values at the laser head. 😺 ---
**Author:** ![Brucescarpet](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/b/8c91f0/32.png) [@Brucescarpet](https://forum.lightburnsoftware.com/u/Brucescarpet)\ **Post date:** [May 17, 2026, 1:39am UTC](https://forum.lightburnsoftware.com/t/help-i-cant-get-the-laser-to-fire-anymore/158275/8 "2026-05-17T01:39:15Z")
Go to move set the speed to .5 see if that helps ---
**Author:** ![NicholasL](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/nicholasl/32/40942_2.png) [@NicholasL](https://forum.lightburnsoftware.com/u/NicholasL)\ **Post date:** [May 17, 2026, 8:36am UTC](https://forum.lightburnsoftware.com/t/help-i-cant-get-the-laser-to-fire-anymore/158275/9 "2026-05-17T08:36:29Z")
Closed on May 17, 2026, 8:36am UTC