1. Turn off the fax/printer and turn it on again.
2. Wait till the screen shows the Ready display.
3. Press the Menu (wrench icon) button.
4. Press the Left (Left arrow) button and the OK button simultaneously
5. You should see the 2ndary Service. Press OK to select.
6. Press right arrow until you find File Sys Format. Select that.
7. Wait until the system finishes the formatting. After that, the fax/printer should be fine and ready to receive new faxes again.
Note: If the screen shows blank or just "Initializing" and the keys on the panel are non-respondent, just open the compartment where the toner is located. You will see the "Door Open" displayed on the screen; you can now press any key after that.