Converting a monitor from 625 to 405

[Mike Watterson]

One thing I am curious about is the red lamp on the front panel. What is it for? The wires from it goes to the rear panel. Possibly to a 3 pin connector.

To show which screen/camera has been selected in a Gallery, possibly same signal as the light on the camera, but I think sometimes the person in shot was told to look at the lit camera light, which cunningly might not have been the active one.