To replace a toner cartridge follow these steps:

1. Check that the power is turned on, and the printer is connected to your device.
2. Open the printer’s front door if it’s a laser printer.
3. Locate the toner cartridge inside the printer.
4. Open the toner cartridge door, twisting it in the supplied direction.
5. Extract the empty toner cartridge from the printer.
6. Unpack the new toner cartridge from its protective package.
7. Insert the new toner cartridge into the printer, aligning it with the corresponding slots.
8. Close the toner cartridge door.
9. Execute a test page to ensure that the toner cartridge is successfully installed.