Hi Dave, not sure what I have done but all is working again! I powered down the main household electrics, removed the cover to alarm control box, then checked all three fuses only to find them all in good order, so I replaced the cover to the alarm box powered back up the house main electrics, pressed the reset button on the keypad buttons and for some reason all was fine again, very strange! however, its ok now.
Thanks again Dave, regards Mark.
Mark, May 2008