I'm already getting weird stuff. There seems to be some cracking sounds coming from my external speakers when a sound plays, and it can either go on for a long time, or it just plays a little "scratch". HOWEVER, this seems to happen when my external hard drive is on and is accessing the hard disk in it. When it's off, there's no crackling at all. Could it be a problem regarding my hard drive? Or is there an actual fault with my mini's sound? Thanks.