earleee

What is the best course of action - I have a Homelink ( Scantronic) 75 Security System installed over 3 yrs ( the installers have gone bust and I cannot therefore get the original installers to maintain system) Over the last 6 months the system as gone down specifically - the passives batteries. Can I simply replace batteries with lithium AA cell batteries will this restore the system to normal functuality at the control panel or does the new batteries mean a total reset? Secondly, can I add further 2 passives (I believe I'd need the Scantronic 714R passive infra-red detector & transmitter) and a panic alarm or do I need professional installers due to complexity of the Homelink 75 system - if the answer to the above is yes to me installing have you the items in stock how much would the overall cost be including postage? Any advice concerning the above would be appreciated.