Ive been having problems with my laser for a while it puts out just a little beam just strong enough to discolor wood. I put a meter on it and get 4 mililamps no matter what the input control voltage is going to psu. I finally pulled the high voltage tape off of the input to the laser. it is a slip on fitting and this is the color of the pin. Its a darkgrey to light black color. Is that the color it is supposed to be?