Using the printer control panel
Turn off the printer.
Hold down 2 and 6 while turning the printer on. Release the buttons only when the screen with the progress bar appears.
The printer performs a power-on sequence, and then the Configuration menu appears. When the printer is fully turned on, the touch screen displays a list of functions.
Touch Wipe Disk, and then touch one of the following:
Touch Yes to proceed with disk wiping.
Touch Back > Exit Config Menu.
The printer will perform a power‑on reset, and then return to normal operating mode.