I can't imagine it's pulling too much juice for the board. Since they've elected to not mark the panel on the back, are you sure you're plugging in to the correct port? Also, did you build the computer or have it built? It's possible the front ports aren't connected.
Either way, it's hard to tell from here, obviously. I would vote either something isn't hooked up right or something is wonky with the ports. It's either or.