Is it a Digital 1232 or analog? 1232D on the cover is Digital. old or new trace the door box wire to the unit. Open it if.. you tested what I first said. Make sure the system's off. Then pull out the card, or the connector to the main unit if everything looks good "not corroded" then reinstall it. Power back the unit and test again, If it works your home free... but if not, order that card and replace it. No programming is needed most times but.... you know the drill.. Good Luck.