Hornet Car Alarm 477T Keypad is Dead

I have a keypad i believe it is the 477T it has a LED screen .. anyway one day it just went dead .. so I changed the battery and still no luck .. is there a reset button on this alarm keypad or a way to fix the key pad without buying a new one ... replacement keypads are almost $100 ... i changed the battery but there is no power at all .. any help would be greatly appreciated .. Thank you