bridgebum: Well, the batteries WERE dead. But in taking the cache apart, I noticed a couple of other problems. Some of the wooden "structure" has cracked and has mold on it. And there are electronic issues that need addressing, particularly with the keypad. All in all, it would take more effort to fix than I am currently willing to devote to it. So we are reluctantly going to "pull the plug".
Thanks to everyone that gave it a "favorite"!
bridgebum and dirt_digger