In HL devices:
Open the front cover and leave it open this while performing the following steps:
1. Turn off the printer.
2. Hold the button "GO" (or "Start" button) when the printer. All ads should now light up
3.Lassen the button "GO" (or "Start" button) going on.
4. Press the button quickly "GO" (or "Start" button) 2 times.
5. Pause. All ads will light.
6. Press the button once "GO" (or "Start" button) 6.
The toner light should be off.
7.Close the cover. The Ready LED should be turned on as a single lamp
For DCP-devices:
Open the front cover and leave it open this while performing the following steps:
1. Press Void key
2. Press the Start button and quickly the down arrow key to E0 (or 00) appears in the display
3. Confirm with OK (now should run! Appear in the display)
4. Close the door.
In MFC devices:
Open the front cover and leave it open this while performing the following steps:
1. Press Void key
2. * key then press 0 then 1 (on some devices they must alternatively the * key twice then press the number 0
3. now should run! appear on the display
4. Close the door.