I just setup my MediaPC last night with the Fatal1ty F-I90HD as the heart of the beast.
Im using the HDMI to go to my 50" Sony TV and it worked a treat with XP MCE, so this morning i thought i would go and attempt Vista on it before i settle with it all.
The HDMI displayed all the way through the BIOS as normal and the same with the Vista install process but as soon as it had finished installing and went to boot for the first time it refused to display anything via the HDMI.
Are there any known problems with the HDMI Port on a default install of vista?