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Any suggestions as to what alarm system I can use to replace this one and keep the sensors + dialler?

Took the battery off, still the same

Image by EverF posted 6 Sep 2015 at 1:29 PM

after a power cut the other day the alarm sounded for some time from the battery backup. Since the power was restored the keypad is not responding, it has a number of black squares then "1.1" showing on it. I took a look in the alarm bos to check for blown fuses but they are al intact. I have...