I have a IMac G5 1.8 with the old PC processor 160GB hard drive. It appears that the hard drive has gone bad, according to the clerk at the Apple store as it shows a blue screen and then some sort of small message that it is unable to access files (I believe that is what I was told). Anyway because it was over 5 years old I went ahead and bought a new Mac Mini. Now the old IMac is just sitting around gathering dust and I am thinking of replacing the hard drive so that I can sell it and recoup more of my money than I would just selling it for parts. Anyway what I need to know is can I replace the hard drive with any 160 GB or does it have to be a like hard drive? The problem is that a used hard drive will also be 5 years old and really do not want to send good money after bad. Appreciate any thoughts.