Thank you both. I din't know that about the grey disks but that solves a different mystery for me. I was hoping to run 10.5 for the sake of time machine but not having a copy, it didn't make sence to go buy it just to find out.
And what is the latest version that will run on a G4.
I have 2 machines that I want to keep up and running. The first is a Dual 1 gHz G4 with 2 Gigs of ram(mirrored drive door) and it has 10.4.11 installed. The second machine is a Single processor G4 700MHz with 768megs or ram and has 10.3.9...
I had a similar experience just yesterday with my old (2002 or so) G4 Dual 1gHz. I was trying to get it to boot so I could give it to someone who needs a mac but having a very similar problem to the one you are describing. It was baffleing me.
You know how all fast graphics cards have a 4...