The socket in the room is dead. How to check what is wrong?

It's simple. If the socket is dead, find it first.

Junction box

shunt

Air switch

That is to say, control the switch of this socket to see if it is

travel

If not, measure the outlet end of the air switch with an electric pen, which is generally below. If there is no electricity below, the switch is broken; If there is electricity at the lower pile head, please remove the socket panel and measure the electricity on the socket.

terminal

, see if there is electricity; If there is electricity in the fire line, check it.

zero curve

Whether the wiring is firm; If the fire line is broken, there is something wrong with the line. If it is sent directly by the switch, then the line will be changed. If it comes from another socket, then continue to dismantle the socket and see if the live wire has fallen off!