How do I replace the toner cartridge on the HP LaserJet Pro M203?
Open the cartridge door, remove the old toner cartridge, and unpackage the new cartridge by pulling the release tab on the packaging. Align the new toner cartridge with the tracks inside the printer, install it until it is firmly seated, and then close the cartridge door.
From the official HP Laserjet Pro M203 Printer manual, page 30
Have a follow-up question?
Answers from the official manual.
Common questions