Here is the setup Mother Board = G3 Minitower $77D.45F2 Rev C (rev 3) Memory = J3 = 256 Mb PC133 SDRAM Video Card = PCI Slot F1 ATI,mach64-3DUPro DVD ROM = Matshita DVD-ROM SR-8582 Hard Drive = ATA 0-0 = Maxtor 40 gig (partition 1 = 7.9 gig MacOS 10.2.4) (partition 2 = remainder of drive for storage) ATA 0-1 = Quantum 6 gig (partition 1 = MacOS 9.2.2) ATA 1-0 = DVD ATA 0-1 = ZIP-100 (25.D) The Problem is "I Can't Boot a MacOSX CD". I have tried all kinds and I have swapped the CD drive. Swapped a the drive cable. Booting any MacOS 8 or 9 is successful. The MacOSx CD mounts fine under 9. I have been running this machine under 10.2.4 for over 6 months. Not out of the blue I can't boot a CD and I cannot boot back into the OSX partition. I am baffled any ideas what might be the problem. Larry Blodgett lblodgett at macosx.com