To restore factory defaults, follow these steps:
On the remote, press SYSTEM. Be sure the correct TV input is selected
Press the RIGHT ARROW to highlight the "media centre" icon and press ENTER
Press the DOWN ARROW to highlight "RESTORE SETTINGS" and press ENTER
Press the UP ARROW to highlight "YES" and press ENTER. The display asks: "Have you been instructed to do this?"
Press the LEFT ARROW to select "YES" and press ENTER
Press EXIT to leave the menu