hi to fix your alarm you should open the box to the alarm not the keypad remove the battery cables and then turn off the power to it
after a min hold the spring in an turn the power back on but do not refit battery yet key board should now work if not or it locks up the check tamper on main box panel and also keypad
when all working then refit battery but if it is older then 3 years it should be replaced
hope this helps
chris
February 2007