Soo, my brother wants a laptop, so I offered him my old iBook G4. I haven't used it in a year or so, and when i last used it, it worked just fine. I was, of course, expecting it to work like a charm. I turned it on, usual "dummm"-sound. Then it was white for a while, and then starting showing a folder logo, with the finder logo and a questionmark inside it, switching between the two. There is sort of a clicking sound all the time, almost the like there is a hook trying to hook on to something, but is failing at it. That's the best i can describe. Any ideas of what i can do?