I have been searching for solutions to my PB problems for a few days now, but I still have a question. I have a Rev. B, PowerBook 12", 1Ghz, running 10.4.6, with 768MB RAM. My computer has been having endless beachball, only stopping when I force a shutdown. Very slow response, this post took me about 10 minutes to type because of the freezes. I have been thinking my fans were broken because of the noise my powerbook makes. It makes a really loud buzzing noise, and when I move my computer to different angles it changes tones. I ran disk utility, but to repair the disk it says to insert the OSX disk. My Tiger install disc is broken. I have it, I have the reciept for it, but I can't use it. My Applecare ran out last month. I backed up all of my data as a bootable back up. Finally, here are my questions: Is it worth it to buy a new Tiger DVD? Will that, most likely repair my HD? Is it cheaper to send it in to Apple and let them have a look? Is it cheaper/easier to buy a new Hard Drive and install it myself? Am I right, could my fans be damaged - or is that a typical noise for a HD that doesn't work?