Either the plug is not in good contact with the jack, or the cable inside the station is broken.
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Obviously there is a problem with this socket, it should be the contact shrapnel of the socket is not good, or caused by poor contact, it is recommended to replace the patch board.
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If other appliances are working well in these sockets, then obviously there is a problem with your phone charger; If the test pen test has electricity, please note: 1. Do not only measure the live wire, see the live wire has electricity as normal, you also need to test whether the neutral line is out of power, if the neutral line has electricity, the neutral line has been broken. 2. Try not to use digital display test pens. 3. If the test pen tests that the live line has power and the neutral line has no power, please access a load. At this time, if the live line has no power, the live line has a problem (the break or contact resistance is too large), if the neutral line has power, then there may be a problem with the neutral line.