I put a new dvd burner in my G4 AGP graphics model running 10.4.7. 500mhz, 480mb ram. The other drive I had put in was recognized perfectly. It was not a dvd burner though, just a dvd drive. It's a lite-on (can't remember specifics). It's set to slave. Does it need to be set to master or something? It's plugged in the right way and everything.