Recently got a PowerBook G4 15" 1Ghz Titanium. I was just using Mac OS 9 when the hard drive started clicking then got a sand timer with a black and white beach ball in. I had to shut it down with the power button because everything stopped responding. I booted it back up, but got a grey screen and eventually a flashing floppy disk with a question mark. I then booted of a CD and something started screaming inside of the computer, was quite loud. Then booted to a tiger dvd after loud screaming and clicking on boot and opened disk utility. It would not load the disks. Same on a Mac OS 9 CD. Used target disk mode to a Mac mini G4 and same result from disk utility, and terminal with "diskutil list", it would not erase with "diskutil eraseDisk", just did nothing. So I shut everything down and took the Hard Drive out of the powerbook, booted back off an external firewire, and there was no more screaming, so I know that the internal drive had failed. What I noticed was that the fans were running at full speed constantly, which I expected because I have heard of fans related to the hard drive. I need to put a new Hard Drive in there obviously, but I need the fans to run like they originally did and not at full power all the time, when the new drive is in. Which drive should I get, so the fans will work properly? Someone please list Hard Disk and SSD options, that will make the fans run as expected when I install the new drive. Cheers.