- Make sure that the machine is turned on.
- Open the front cover.
- Put the drum unit and toner cartridge assembly back into the machine. Do not close the front cover yet.
- Press and hold down the Go button for about 4 seconds until all the LEDs light up. Once all four LEDs are lit, release the Go button.
Caution
Do not reset the drum counter when you only replace the toner cartridge.
- Close the front cover.
- Make sure that the Drum LED is now off.
