First off, thank you @kenwood850 for posting your answer. This was the only resource I could find that explained the 10 beeps and helped me get my server up and running when I ran into the same problem. I'd like to add one detail that I just discovered and made me very happy...
It looks like the 10 beeps isn't actually a fatal, just a warning that you have no way to display anything. But if you're building a headless system, you can borrow a video card to set it up, and then remove it once it boots to a state that is accessible to the network. It does look like boot time takes a bit longer, but that's probably not a huge concern on a server board.