How to use a non-contact Smart Non-Contact Voltage Tester Pen to test the lamp to detect the quality of the ballast of the fluorescent lamp
The fluorescent lamp is not normal, check the ballast. Ballast string inspection lights, jumper two hundred and two power supply. The lights are dim reddish-orange and there is no fault in the ballast.
Lights near normal, there is a short circuit, no disconnection or desoldering.
