Before I go to Apple with this problem, I wanted to run it by you guys, and see if anyone had advice.....

I reinstalled OSX yesterday on my macbook, just to clear out everything and start over with only one administrator....anyway.....install went fine, then the mac locked up. i restarted, and BOOM...folder with question mark icon pops up. Disk utility will not recognize my hard drive, and I have already reset PRAM, and tried fsck in single user mode.

any ideas??