1. Check the indicator light of the power adapter. If the indicator light is on, it is generally believed that there is no problem between the power supply and the adapter. It must be ensured that the indicator light itself is not broken.
2. Check whether there is power between the power adapter and the computer. This can be shown by the indicator light of the notebook. When the power is charged to the notebook, the charging indicator light will be on. Otherwise, it will not light up. Or try to replace it with a power adapter of the same brand and model.
3. Observe the indicator light of the computer. If you plug in the power adapter, you can see whether the charging indicator is on or off, and judge whether the power adapter is in good condition. If there is a problem with the interface, it is generally possible that the internal wire is broken, the circuit board is aging, the welding falls and other reasons. This is called the phenomenon of faulty soldering. This situation can only be repaired by professionals.
