Having troubles with my Blue & White Power Mac. It was a G3 but was upgraded to a 500 MHZ G4 before I got it. Questions first, then story to explain. What could cause the OEM CD-ROM drive to forget how to boot from a disc? How do I fix it? Regardless of what disc I put in the drive, it won't boot when holding down "c". Here's the back story. Mac had two hard drive, one 6GB original in the bottom of the caddy, one 40GB in the top of the tray. The 6GB had 10.3.x on it but was so full it was hardly useable. The 40 has Mac OS 9.2.2. I removed the 6GB from the bottom of the tray. I bought a Western Digital 120 GB drive and installed it in the bottom of the tray. Installed the 40 in the top. Computer didn't recognize the 120 gig drive so I swapped the two. Now the computer wouldn't load the system, I got the folder with question mark flashing. Realized jumpers were probably wrong. I don't remember what setting I put them on but managed to get it to boot again and it recognized both drives. Problem is it would occasionally crash when booting from the 40 gig drive (I would get the "finder unexpectedly quit, please reboot" message, it's never done that before). In the meantime I wanted to install a system on the 120 gigabyte drive. I managed to boot from a Debian Linux disc and started installing it. The installation froze halfway through so I had to power it down and and boot into System 9 again. I was still getting the "finder quit" message so I shut it down. Made sure the bottom drive was set as master and the top drive as slave. Booted again, no finder errors. Initialized the 120 gig drive while running OS 9 from the 40. Inserted the OS 9 CD, rebooted and held down "c". Got a blank gray screen that wouldn't go away. Tried booting with the Debian CD, same story. Even tried a 10.3.5 CD with no luck. By initializing and installing the drive that wasn't in use, I put a fresh install of 9.2.2 on each drive, thinking that might kill the gremlins. Computer still won't boot from any CD, I have booted from many CDs before. I'm stuck, any help would be great. Any idea what went wrong here? ---------- The reason I need to be able to boot from CDs is I recently bought a 10.4.x installer CD set which I was hoping to install on one hard drive. I'd like to put Linux on the other hdd. If I can't boot from the CD-ROM drive I'm stuck with system 9.