My friend just got a new 27" iMac, and I am trying to help him set it up. If it is just turned on it shows a white screen with a grey "?" folder, and if I insert the Snow Leoperd install disc, when it gets to choose which HDD to install it on, none appear. In Disk Utility it shows only the Superdrive. It is as if it has no HDD. Does anyone know what would cause this or how to fix it? Quick replies appreciated 