Q: When I press up & down keys the laser go up and down (this is ok), but when i press left the laser goes right, and when I press right the laser goes left. When I try to engrave images, this is the result:
How to fix?
**A:**Firstly, please make sure the color of the wirings is in the correct order (Blue, Red, Green, Black), if not, kindly change it. If the problem still exist, please exchange the Port1 and Port2 on the main board.
