I have a ibook G3 800 MHz and when I power it on you hear it boot up and hear the apple sound and the fan spins and everything, but no picture comes up at all. I have three other screens I already tested on another ibook and they work perfect, and when I hooked each one of them up to it, they did the same exact thing, no pic. Can someone please help me trouble shoot this issue I am having or tell me the problem, I am new to working on mac or anything Apple. Thank you for your time.