The HDMI cable is connected to the Direct tv box. If I hook up the Direct TV box with component video to a component video input, it works, with the HDMI to component Video cable, it does not. I have not tried to hook up the Mac Mini with a DVI to RGB Adaptor and then RGB directly into the projector. My feeling is it will. Are these other inputs "Digital" where as Component Video and RGB are "Analog and wont communicate?
Others have touched on this, but what device are you using to convert HDMI to component? This is not a basic conversion. DVI cables can include both digital and analog connectors, but they are separate paths - digital video and analog video paths contained within a single cable, but without any "mixing" between the two. The DVI to RGB adapter may work if the video output of the Mac Mini includes both analog and digital signals from the DVI connector. HDMI is purely digital, with some significant copy protection limits. Component video is purely analog.
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