after a power failure the alarm started and the keypad lights went out.
On resumption of power the alarm stayed on but the keypad came on which allowed me to disarm the alarm.
The battery is about 5 years old and I wondered if this could be the problem. Would I be able to fit a new one myself.
The alarm is a Accenta8mini.

Robert Oldershaw, August 2012

Yes, isolate the mains...........the big electrickery to the panel.
Get battery size and buy one.
Fit replace lid then mains and turn on,


more details in other posts, have a read

Alarm, August 2012