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It should be that the line is not connected, the contact is poor, and the hydropower concealment project decoration company has a warranty of 5 years.
The electricity is grounded, and the zero live wire is reversed
If the switch is connected to the wrong wire, the switch with the zero line should be connected to the switch.
According to the description, maybe the driver of the light fixture in your home is broken, so you can try another one.
This is caused by induced electricity, and it should be improved by swapping the position of the live wire and neutral wire of the electric switch.
Don't worry, because the switch wiring of your living room light is wrong, and it goes to the zero line, you turn off the zero line, and the living room light will still flash, but the zero line of other sockets and lights is turned off by your switch, so there is no electricity.