My PowerBook G4 DVD lens is dirty, with the PowerBook G4 cleaning the lens becomes quite a issue since the drive is completly internal. I would like to know if any has had to do this before. The reason that leads me to believe the lens is dirty and not a broken drive is that I recieve an error that states OS X can not read the disk, then I try to intallize it for the fun of it (PS this is a REV A tibook) it can read the size of the disk but not the disk. That's why I believe the lens is dirty. Please any help at all would be welcomed.