I have had a Veritas Burglar Alarm for four years. Never had a problem until the other day when it refused to arm (one zone is always "in fault" and cannot be cleared). The electrician that installed it has had a look and thinks its the main processor in the panel which has gone - cost £120 - £150 to replace. He is certain that its not a faulty PIR.
While I completely trust his judgement (used him for years - never had issues), I cannot believe that this "processor" has gone after just four years. Does anyone else have experience of this?