First turn off the power, check the cause of the fault, and then take corresponding measures according to the fault situation. There are different treatment methods for different situations such as circuit failure, lamp burnout, rectifier and segment switch damage, lamp bead damage, etc. The details are as follows:
1. If it is a circuit failure, you need to reconnect the power supply.
2. If the lamp is burned out, you need to replace it with a new one. Before changing the lamp, turn off the power first to avoid troublesome electric shock. If the switch is in poor contact, reconnect it.
3. If the rectifier and segment switch are broken and the tri-color light is not on, the rectifier and segment switch can be replaced.
4. If a set of lamp beads is broken and the tri-color lamp does not light up, the damaged set of lamp beads can be replaced.
5. If the internal circuit of the lamp is broken and the tri-color light is not on, you can find a professional electrician to deal with it.
