Power printer on.

Press and hold the STOP button during the memory count

Release once all LEDs are on solid.

Press and release the CHECK button. (Please note that nothing happens on the screen)

Press and release the MENU button. (You will now be in the bootloader)

Press the down or up arrow until you see CLEAR ALL RFU ERRORS.

Press the down arrow until you see SET RFU ERROR OFF. Press the CHECK button. (This will highlight the A in ALL) Press the CHECK button. (This will initiate the command)

Power cycle the printer.