"Take out any disc and put the recorder into stand-by. Unplug the unit from mains power and wait for one minute. Press down both the REC and EJECT buttons, and keep them held down while plugging the unit back into mains power. Keep the buttons pressed until the unit powers up. The display should now read "FORCED DOWN", followed by "OPENING". When the tray is opened, put in the firmware CD you wish to revert to and press the tray in to close. After the firmware installation process is completed, the display reads "REMOVE DISK" and the tray opens. You can now remove the disc and close the tray. As the unit goes into stand-by, the firmware reversion process is completed. "