I got a Dell Inspiron E1505, and for some reason the powerbrick is beeping. It isn't very loud and only makes it if the AC adapter is connected to the computer. If it is still plugged into the wall and not into the computer it doesn't make the noise. I never noticed this sound before but my brother was sitting next to me and heard somehow when the adapter was sitting on the couch. I can only hear it if i put it close to my ear. I was just wondering if this is a normal sound, or if something could be wrong? Thanks.