hi jo,there is no point in telling you how default the panel back to factory settings,because,1 this is a public forum,2 you dont have the engineering manual,and 3,you would have to reprogramme the panel,there is no point in turning power off ,then on again,it wont change anything,sd not know about a nvm,(panel has a non volatile memory)cant be erased by turning power off,best thing for you to do if you are sure that you want to kill the system,is,remove the fuse from the fused spur that feeds the panel,open panel,remove the red or black wire from the battery,the outside sounder should sound,but it will at a reduced level,just let it sound till it dies,and there you have it,system killed
gts
February 2012