Won't boot without video card

Hi,
I have a PT880 Neo-LSR and am trying to run a unix OS.  This is the first time I've used a MSI board, but I've used many other boards without graphics cards since these are being used as servers.
The problem is that the OS won't boot up unless I throw a pci video card or a agp video card on the board.
Is there any way around this?  I've searched in the bios but nothing looks like the culprit. Is there a jumper?  Or is this a limitation of the board?
Thanks,
Bob C

I have never had a Server Board but why would you want to boot up a OS without a vidieo card...???  You should be able to post up to the point where the Beeps will let you know that no video card is present.. if a speaker is hooked up.. How you going to see what you are doing in the Bios.??? I must be Tired ....

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