I have an under-counter halogen light (jc / g4, 12 watts) that doesn't work.
If I remove the glass safety cover (might be called the lens) from the light socket then the light works fine, and will illuminate when I flip the switch. As soon as I replace the safety cover, the light stops working again.
The cover is made of glass, with a metal circle at its outer edge. The cover attaches to the socket by three L-shaped metal arms.
If I power on the light with the safety cover attached, it produces no light, but it makes a quiet clicking noise, about 1 click per second.
Does anyone know what's going wrong here, or how to fix it?