In order to help you locate the cause of the fault, please shoot a video to us.
This video should include:
- Disconnect the connection of the laser module
- Aim your camera at the LED on the control board
- Connect the 12V power
- Connect the USB cable
If you don’t know how to upload video, The following link may be helpful:
https://neje99.com/forum/how-to-attach-a-video-when-i-post.html