HP LaserJet Enterprise MFP M725 series - Manual (Page 75)

Replace the toner cartridge
CAUTION: If toner gets on clothing, wipe it off with a dry cloth and wash the clothes in cold water.
Hot water sets toner into fabric.
NOTE: Information about recycling used toner cartridges is on the toner-cartridge box.
1. Press the cartridge-door-release button.
2. Open the cartridge door.
ENWW Toner cartridge 61