i recently purchased my first two lasers(400mw blue+300mw red) and immediately got two fb3 controllers and one won't send a signal. the light on the box that should be flashing red only flashes yellow. i have opened the unit and nothing appears broken, all sauter is intact and nothing seems amiss. does anyone know what could be issue? i haven't seen any help on diagnosing a problem with these on any forums or anything telling me what different color lights mean. also my quickshow software says both units are working properly.