Think about using a wireless Joey and Joey access point. There could be resistance differences between componet cable and 75 ohm coax. Hdmi to coax to Hdmi converters work well but one section of a componet cable may not have the same characteristics as a coax cable depending on the construction of the componet cable.
This is not a silly thread, there is a lot of confusion about wiring, what is compatible with what. I did business and home theater wiring for over twenty five years, including Ethernet, background music, telephone, all types of conversions, such as VGA and DVI over cat 5e, you name it I did it. Motorhomes are not easy to wire, worse than a house so discussing finding unorthodox ways to make things work is a good thing.
Just curious, how does you Aquos look when viewing broadcast HD off air?
edited for clarification.