The HDD in my wife's black MacBook (2007, I think) won't boot up. I've run Disk Utility and have decided it's pretty much dead. I have a Carbon Copy backup, so the data is fine. I've tried replacing the drive twice now, and the MacBook simply won't "see" the new drives. When I install the drive, nothing shows up in Disk Utility (run either from the install disc or the Carbon Copy backup drive in a USB enclosure). The new drives are formatted (I even copied the bootable backup to one of them), and the computer sees them just fine if I install them in a USB enclosure and hook them up that way. When I put them in the computer, though, no dice. Her old, corrupted HDD still showed up in Disk Utility when I reinstalled it, but the new drives don't... What am I doing wrong?!? What else can I try?