@berainlb Ah, missed that when I read through.
@Newlands Can you setup a camera so it can see the psu light and control board light and see which turns off? If the PSU light turns off along with the controller, it’s a PSU problem, if it stays lit, it might be the controller.
Also, have you tried a ghost run? Unhook the motor, laser, and limit switch cables, turn on the machine, and see if it dies. Maybe try running a project to see if the controller goes through the motions. Could be a break/short in a wire or other component.
Also, you haven’t said which laser it is, I know the 20/40W and the IR require a more powerful PSU (my IR came with a replacement brick because of this) and it might be cutting out for overload protection?
EDIT: nvm, see you’ve tried this too. I’m a bit slow this early. 
Only other thing I can think of, besides the above climate discussion, is are you controlling it via USB? Might be a fault in the USB cable, or the PC port you’re using causing a short. Try running it locally via the SD card. You can either click save gcode, rename the file tmp.gcode, and place an M17 at the beginning (edit with any text editor, or place it in the gcode header in lightburn) or use my wifi method to send it to the machine, keeping it isolated with no usb connection.