I have a G4 mirrored doors and lately been experiencing constant crashes, freezes, etc. I've been researching both here in the forums and other places on the net. I keep reading about the Apple Hardware Test CD. There was no such CD when I bought my G4. There is no file on the CD that came with the G4 for restoring software, OS, etc. I have an Apple Care CD but that's only TechTools Deluxe. Can someone help?