Anyone know the principle of operation of the battery test lamp of one of these? The lamp itself looks OK, the switch is OK and the battery is OK but I can't get the lamp to light when I press the test button.
On mine the wire leading from the test switch to the battery compartment was badly coroded and I had to replace it. This corrosion disabled the entire electrical system. If the camera is working OK otherwise this wire is probably not the problem.
