I’ve only tested this on the HL-2270DW, I’m not sure what other models this might work on.
- Turn the printer off.
- Press and hold the “Go” button.
- Wait until the top three indicator lights (toner, drum and error) are all lit, the Ready button should be unlit.
- Release “Go” and lights will go dark.
- Press “Go” 6 times.
- All indicators should light up.
TechnoGreg 