Access the menu options manually
Press the set's Volume (+) and (-) buttons simultaneously to activate the Menu display. Use the Channel Down button to scroll to the desired menu item, then use Volume (+) or (-) to change that item, or to activate a sub-menu if any. (If in a sub-menu, again use Channel Down to reach the desired item, then Volume (+) or (-) to change its setting or value.) When finished, press Volume (+) and (-) simultaneously as needed to "back out" of the menu.
Not all set functions can be reached this way, especially a few involving numeric entry; but this will get you started. Good luck!