I pulled a IBM drive out of a G3 300MHz and installed in a G4 733MHz. I have tried multiple jumper settings and all that happens is the normal chime, drive clicks twice like it is about ready to mount but doesn't. I thought I had installed a drive in this computer in the past and it had the jumper pins on the first and fourth pins vertically. This is what works with the G3 fine, but no dice with the G4. Thanks. No question mark, and the screen on the monitor illuminated with the background wallpaper, but no mounted hard drive or any other icons. I take the drive out, reinstall back into the G3 300Mhz and the drive works and just fine. Any help would be greatly appreciated. Thanks.