I am a new user to ImageJ software. We use the software in conjunction with a Transilluminator for imaging of DNA gels in our laboratory. When we start up ImageJ and turn on the Transilluminator darkroom (table top model) and the UV lights on inside the darkroom, all we see is a white screen. I have played with the parameters, brightness/contrast, etc, and I don't know exactly what to do to possibly pinpoint what could be the problem? Is it some adjustment of the image parameters or is it likely the camera? Thanks.