macbookpro hard drive cable
the infamous folder with the question mark! apple store tried changing the hard drive but did not work. gave it back to me. the geek squad could do nothing about it as well.
the repair worked out well and got my macbookpro working again. took me about 15 minutes to set the part in and 45 minutes more to install things back on to the drive. i think this is a common problem with the 2009 macbookpro.
the instructions on ifixit are very clear. its difficult to do anything wrong