My computer is running very slow. After running Apple Hardware Test, I got the error code 4HDD/11/40000000:SATA(0,0). Here is what I've tried so far; verified disk, verified disk permissions, repair disk permissions, and used HD Cleaner.
Disk Utility showed nothing was wrong. Then I decided to wipe the SSD and reinstall Yosemite, yet it's still running slow. Could it be the SSD or the SSD tray's ribbon cable has been damaged? Or something else?