For the high scale on the Pentax spot the battery ground goes through the battery lid latch (that must be clean) then the battery lid hinge (also must be clean), then the screw/socket for the strap/tripod. A lug and wire pick up the ground inside on that screw(take the case off to get to that screw). If any of these are loose, the high range doesn't work. Also the spring contact at the side of the battery holder must have pressure when the lid closes, and be clean. WD40 is a good cleaner, used with plenty of paper wipes to keep it from running inside. Mine had the same problem, these fixed it.