Hey guys, So @N64 freak posted his awesome PCB HDMI converter in another thread. With luck he will be able to make these available for everyone. Until such a time I am annoyed with having my DIY Component cable going into a cheap amazon converter. I figure it would be easy enough to do the "dirty version" where you gut a converter down to the PCB and solder wires to the mobo. In researching the pinout of the AV connector on the mobo i found a great post from a gent named William Quade. He did a nice write up on his blog about doing it and I thought i'd share it here in case someone else is interested.
https://quade.co/2017/original-xbox-hdmi/
Note: He admits his hole for the HDMI port is terrible and I recommend anyone who's doing this mod do it properly with a panel mount HDMI or at the very least, cut the hole with a dremel. His looks like a tiny bear was trying to get into his xbox but the point of the blog post was to show where you need to solder which is the important part.