I have been tasked with trying to restore a damaged HDD in a Macbook pro. I have rebuilt the volume successfully using Disk Warrior, verified the disk and fixed permissions with Disk Utility, and it still won't boot. So, I tried booting to 'Safe Mode' but couldn't, just get the Apple symbol and a spinner. Then I tried to boot to an install CD from my personal Macbook and I get a 'No Symbol' and a spinner...no boot. Now after researching some more here on EE, I found an article that said to boot to single-user-mode and try the 'fsck' command. It booted to single-user-mode and the screen continually rolls with messages stating 'dyld: Library not loaded: /usr/lib/libiconv.2.dylib Referenced from: /bin/sh Reason: image not found'. I tried to type in the /sbin/fsck -fy but the screen cycles too fast.
More info: I have verified that it is not a failure or other hardware by using a known good HDD and OS and the Macbook booted and ran properly.