Slide the release latch on the right side of the printer, and then open the top door.
Remove the toner cartridge by lifting the handle, and then gently pulling it away from the imaging kit.
Unpack the new toner cartridge, and then remove its packaging.
Align the new toner cartridge, and then press the cartridge down until it fits into place.
Close the top door.
Seal the used toner cartridge in the bag that the replacement toner cartridge came in before disposing.
For more information, see Recycling Lexmark products.