High Pitched Whine

I recently picked up a free motherboard that had been in storage for two years. The previous owner only knew that it worked before being stored. I set it up, and all seems to be well except one thing. When power is applied to the motherboard their is a short "chirp." Then, a few seconds after power is removed there is a very high pitched, about five second long whine.

What could be causing this whine? Is it safe to use the motherboard?

I really can't seem to locate the source. All of the capacitors look good, but not that you mention it, the "whine" that I mentioned sounds like a drawn out capacitor drain noise...