After not being used for many years (we had a big dog) I felt that it was time to awaken the alarm. On keying in the code numbers it started to beep and kept on beeping in sequences of 5 beeps. After waiting for it to stop I gave up and tried again. Same thing, I counted 25 sequences of 5 beeps and realised that it wasn't going to stop. I tried the walk test but it wouldn't let me do that. When I imput the code one of the zone lights stays on, it is the garage zone, when I went in the garage the pir did not light up. Is this relevent and if so what should I do to rectify the problem.