Exposure hand switch is out of power

A customer came to inquire that the exposure hand switch is out of power, and there is no radiation when the exposure hande switch is pressed. At this time, you can use a multimeter to detect that there is no voltage and current after the exposure hand switch button is pressed.
It is very likely that the wire of the exposure hand switch is broken, or the wiring is faulty, and further testing is needed. If the exposure hand switch is faulty, just replace the new exposure hand switch, and test the new exposure hand switch before replacing it. The on-off condition of the switch.