Hi everyone, I have a 2009 13" MBP. A few weeks ago it spontaneously started giving me the "question mark folder" on startup, i.e. it couldn't find the startup disk. I used the CDs to examine the problem, and figured I would replace the hard drive in case it failed. Well a hard drive replacement has not fixed the problem. Disk Utility still does not list the hard drive in its list, and basically it seems the computer just can't see it. What else should I look into? Thanks for any recommendations!