Why can't I find the switch socket of Harmony House?

1. First, visually observe whether the positions of sockets and sockets are correct, missing or damaged, whether the indicator light is normal and whether the appearance is damaged.

2. Then smell the socket with your nose for burnt smell or peculiar smell.

3. Finally, gently pull the related wires, plugs, sockets and components by hand to see if they fall off. Pull the relevant parts to test their tightness, firmness and flexibility. After electrifying, touch the power transformer, regulating tube, integrated block or related components to see if there is overheating.