hi there need some help or adivise, i have installed at home an old accenta alarm what version it is i dont no there no marking on it, what i am asking if possible the keypad has never worked, i taken all 6 wires when out of the blue the alarm went of, can i replace first the keypad with a normal accenta one + can i replace the old alarm box out side with a new one as when the alarm went off i pulled the wires out plus the box shatterd with old age any help please with this tia