Hey guys... I have just installed a DVD Burner for PB G4 in my Ibook G3... although the guys at LA Computer said it would work beautifully, it didn't.... Maybe this is an easy one for someone with more experience.. anyone there could give me a light???? I Turn the Ibook on and the only thing I see is the small system "?".... When I substitute the DVD burner with the original CD drive... it is fine!!!!!