My sister has a four year old PowerBook, 1.33 GHz G4, 256 MB memory, running Panther, and it is incredibly slow. It has nothing installed but Office 2004. And I mean really, really slow. She said it has been that way pretty much forever but never said anything because she did not know it was out of the ordinary confused. But I've used an iBook that was older than this PowerBook and it was faster, and it had a bunch of garbage installed on it. I have tried an Erase and Install on the PowerBook - no change. This makes me think it is a hardware problem. But I do not know how to test for bad hardware other than the hard drive, which checks out okay. How do I test the RAM, CPU, etc. to see if there is a faulty component? And, if I do find something not working properly, is there likely anything that can be done to fix it? I mean, it is four years old so obviously no Apple warranty / protection. Nonetheless I would like to know the cause of its slowness.