DOWN STAIRES CLOCKROOM,HALL AND FRONT ROOM LIGHTS DONOT WORK .LIVE SUPPLY IS PRESENT BUT NEUTRAL NOT.HAVE CHECKED PULL CORD SWITCH AND OUTHER TWO SWITCHES.ON OPENING THE WALL SWITCHES I FOUND BOTH TERMINALS WERE COVERED WITH GREEN STICKY STUFF.BOTH TERMINALS SHOWED LIVE WITH PHASE TESTER WHETHER SWI...