Thanks for testing that, Stephen.
Try the following steps to determine if the issue is on the laser end or the board end. We are going to replicate how the board “talks to” the LPSU, but remove the controller from the equation.
With the machine off, unplug the power from the LaserBoard. You do not need power on the board for this test.
Remove the large white power connector from the board.
Work on the connector somewhere where it will not touch anything conducive.
Power the laser machine back on.
Set the digital keys to a low power setting which is high enough to trigger the laser.
Use a short piece of wire to connect the contact metal of the Laser Fire (L) and Gnd (G) ports on the connector. This simulates completing the circuit.
Turn the machine power back off, allow the power to discharge before making any further wiring changes.
Is the laser firing when shorting the wires on the connector?
Invert the Y direction in the board config (beta dir pin) and add or remove a ! after the pin #. Use Sublime Text to make the edits. Make sure the board is powered down when removing and reinserting the card.
beta_dir_pin 0.11! # Pin for beta stepper direction