HP LaserJet Pro 400 MFP M425 - Manual (Page 157)

3. Grasp both sides of the toner cartridge and
distribute the toner by gently rocking the
cartridge.
CAUTION: Do not touch the shutter or the
surface of the roller.
4. Bend the tab on the left side of the cartridge until
the tab breaks loose. Pull the tab until all the
tape is removed from the cartridge. Place the tab
and tape in the toner cartridge box to return for
recycling.
5. Align the toner cartridge with the tracks inside
the product, insert the toner cartridge until it is
firmly seated, and then close the toner cartridge
door.
6. Installation is complete. Place the used toner
cartridge in the box in which the new cartridge
arrived. See the enclosed recycling guide for
recycling instructions.
ENWW Replacement instructions 141