Patchburn isn't needed in OS X 10.5x.
If repairing the hard drive with Disk Utility or Disk Warrior doesn't help, one might consider that the drive is compromised in some way, and consider a warranty replacement.
Before that, what is the jumper set to?
If it is Cable Select, try Master.
If Master, try Cable Select.
The jumper setting could be the cause of the drives unresponsiveness.