The hard drive on my wife's mid-2007 macbook is dead, but how do I make sure that the hard drive is the only thing that isn't working? I'm not very familiar with macs, and I haven't even been able to find out if it's supposed to be able to boot into a BIOS-type environment (EFI?) without the hard drive, or how to get there. I've connected the hard drive to a couple other computers and they don't even recognize that anything is there, so I know that the hard drive is dead. I just want to make sure that everything else is still ok before I order a new hard drive. When I turn on the machine, the screen turns on, and after a couple minutes of white, it displays a blinking folder with a ? in the middle. How do I troubleshoot this? or will I have to take it to an apple service center? Sorry for my ignorance, and thanks for your help!!