The girlfriend dropped her MacBook from a sink-high distance. It's one of the 2008 models, still running Leopard. It worked for a couple of hours after the drop, but then it just went grey on her. When she rebooted, that folder with the ? showed up. I tried booting from the installation disk by rebooting while holding C, then holding Option, and this thing gave me issues for about half hour before I could get to Disk Utility. Disk utility showed me no signs of a hard drive, and when I listened, I heard no noise from the drive - even on a reboot it simply made a ticking noise. So I replaced the hard drive tonight, and still nothing - just the ? folder and the clicking sound. Before I take it into Apple for $285 + tax to fix anything wrong in it, I wondered if there was something else I could try. Thanks in advance.