Hi all, I'm having a problem. I have a Mirrored Drive G4 Dual 1 Ghz. It seems to start up fine, I get the Mac chime but then nothing. I thought it might be my drive so I tried a start up disk and a repair disk, holding down the "C" key while starting up , get my start up chime but nothing else. I just replaced the Motherboard thinking it might be that but that didn't work either. Any suggestions.