Has anyone run this board headless?

I've got a fedora 9 system that runs fine, but when I remove the video card it doesn't get anywhere. I can't ssh/ping the box -- which i can with video card in. The NIC LED also doesn't show any activity during startup as it normally would when services are started. Nothing appears in the linux logs (/var/log/messages, /var/log/boot), and nothing in the bios log. No error beeps. On most mobos you have to set "halt on errors" to ignore video errors, but this bios doesn't have such a setting.

I've looked through a number of forums, but haven't seen anything about a headless configuration. According the manual it should be possible.

Any ideas or help would be greatly appreciated!
Thanks,
TP.