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The switch is broken, you need to remove the switch panel (use the two vertical seams on the left and right sides of the taper warp switch panel), this switch can be replaced individually, or you can directly replace a panel, and you should remember which switch the line (line color) is connected with before changing the panel.
Use a flathead screwdriver to go in a little bit of the gap and gently pry it down
Maintenance method: 1. Check the circuit; 2. The electric switch is pulled off and the waterproof cover is pried open; 3. disassembling the switch; 4. Remove the wires on the old switch panel and fix them on the new switch panel; 5. Installing wires; 6. Restore the switch panel. For detailed steps, please refer to the following: >>>More
The panel is pryed off with a straight taper, and the remaining two screws can be removed with a cross cone.
1. First unplug and turn off the power. Do cracks.
2. Secondly, unplug the rectifier and remove the spring. >>>More
How to remove the bathroom ceiling light if it is broken. >>>More