Hi all.
This is my first post.
I bought a cheap laser head for a project, and then saw an ad for the Eleksmaker a3 pro at a good price (without the laser unit) so bought it.
Problem was when i tried to use it there was no output at all from the laser.
After trying everything i could think of software wise, i had a look at the hardware.
I downloaded a good layout of the control board and looked at the pins on the board.
From left to right they were PWR +, GRD- and PWM, or Red, Black, Yellow, but the wires in the laser plug were Yellow, Black, Red.
I used a small screwdriver to push the red and yellow connectors out of the laser plug and changed them round. The laser worked fine after i plugged it back in.
I hope this helps someone who is having problems.