S2600CW2SR won't post, gives 1-5-4-4 beep code

As the title suggests, I cannot get this board to POST. I've tried with only one stick of RAM and the board out of the case I purchased for it, but no matter what I do I still get a 1-5-4-4 beep code. I've even changed the power source, but to no avail.

Does this sound like a dead board?

Thanks,

Alex