How do I replace the toner cartridge?

Press the cartridge door release button to open the door, then open the cartridge drawer and lift out the old toner cartridge by its handle. Remove the new cartridge from its packaging, take off the protective shipping cover, insert it into the drawer, close the drawer, and then close the cartridge door. Place the used cartridge in the new cartridge's box and attach the prepaid shipping label to return it to HP for recycling. (Pages 44–46)