MBP not booting, but HD seems fine My late 2009 unibody MBP won't boot. I have already booted in single user mode, ran fsck -fy until I get no errors. But when typing 'exit' or rebooting in verbose mode I see, after fsck runs:

Failed to issue COM RESET successfully after 3 attempts. Failing... 
disk0s2: no such device
disk0s2: media is not present.

The HD appears to be working, because when booting in single user mode I can run fsck successfully and can browse the HD, listing directories, inspecting files.

I just don't know why the OS can read the disk but reports it as 'not present' when booting.
That's either a disk on it's way out or something has been corrupted and the OS is having problems mounting the drive.  

Do you have your system disk?  If so, you could try booting into is by holding the C key while booting and run Disk Utility, then do a permissions repair and a disk repair if you can.  

What fsck command did you enter?  fsck -f ?  If not then you should try that too.

If you can get into single-user mode then you can run the following command to repair permissions:

sudo diskutil repairPermissions /