1. If multiple chargers are tested and charging is not displayed after changing the plug-in board, you can first turn off the phone and then test whether the charging is restored to normal, because you have encountered abnormal charging problems caused by system crash in daily maintenance, if you still do not charge after restart, you must find a professional repairman for testing and maintenance.
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2. If the charger can be plugged in to charge, but slightly shake the charging head will disconnect the charge, some are reverse, plug in no charge, shake can charge, this situation is very common, at this time if your phone is Apple, it is recommended to check whether there is an anomaly in the charging interface