Hello, I've just received my iMac 21.5 and unfortunately it has the following problems: - Yellow tint in the bottom right corners - Screen buzz from half brightness up to full brightness - Seagate harddrive rumble If i sent it back, how in godsname will i know if they won't just sent me another one with a seagate harddrive? As it seems, all seagate harddrives suffer from the buzz? Same goes for the others problems too.. Can i ask the people at Apple to send me one with another harddrive? Or is that impossible? Thanks from a dissapointed buyer..