Just like Benbow, my FoxPro died too - for no apparent reason.
It turned out the batteries had leaked just a tiny bit, and corroded a couple of the terminals in the battery box.
I made a solution of baking soda in water, and with a Q-tip wet with the solution, cleaned off the terminals, and let them soak a bit with a drop of solution on them. Then use the Q-tip with plain water to get rid of the solution, and then a dry Q-tip to dry everything off.
That fixed it! Now it works perfectly.
