Loading mac os x 10.3 on PowerBook G4 and froze on restart.

i'm rebuilding my Powerbook g4 after HD failure. loaded HD and got original 0s 9 on it OK. put in 10.3 CD (brand new disks, never used) and got install icon. clicked and it asked to restart. did that. then upon restart it spins up, the the apple icon gets all messed up and it stops. disk spins for 30 seconds then seems to power down (makes a noise thens the fan-like sound stop). so im staring at a messed up apple icon (the icon is missing a chuck and there are grey lines around it.).

the issue is I can no longer get to the desktop because dvd is now start up disk and its stuck in there. any keyboard commands to get this disk out? so i can get it started on 0s 9.

and any suggestions around this, as the dvd drive seems ok, its worked up to this point every time.

thanks, steve