Wierd laser start issue

This may sound wierd, but when I first star up my machine, and turn on the laser for the first time, it will not work. If I remove the fan wire from the J tech box and plug it in to the second output, then it wil start up. I then move the fan wire back to the port shown in the assemby manual, and everything functions, laser will work until I shut off power to the laser. I would need to repeat the wire swap steps to get it to work again. Any ideas what could be going on?