Firstly, if the original adapter has a problem that cannot be repaired or does not have time to fix, you can use another adapter first, as long as the output voltage and power are roughly the same. There is a voltage regulator circuit inside the laptop. Don't worry too much about the mismatch of output voltage. During maintenance, the first step is to prepare tools. We need a multimeter, screwdriver, and welding tool.

　　Secondly, there are four plastic covers on the power adapter. Try not to damage the adapter housing as much as possible. After the shell is damaged, there will be issues such as increased electromagnetic radiation, which will affect the stability of the machine. If the shell is damaged, repair should be carried out as much as possible. During the disassembly process, if the external power source does not provide power, you can insert the battery and try again. If the machine can start normally, there may be a problem with the power cord or adapter. After opening the appearance and shielding layer, for the sake of physical health, first check the solder joints and observe them with the naked eye. The circuit is intermittent and usually has poor contact. Then use a multimeter to check if there are any issues with the power cord, in order to simplify the repair process.

　　Thirdly, if defects are found in the soldering of the resistor pins during the testing process, repair them using soldering tools, reinstall the power adapter, and then begin testing. As a result, the problem was resolved. It should be noted that if there is a problem with the capacitor during the testing process, you can purchase a capacitor of the same model and capacity (priced at about 5 yuan), then weld the problematic capacitor, and then weld the new capacitor together. If you find a problem with the IC power chip, you can use the same method to solve it. Of course, since IC chips are one of the electronic components that make up power adapters, capacitors are too complex.

　　Fourthly, in the maintenance process of selecting power adapters, due to the widespread use of patch components in current power adapters, maintenance will be more difficult once the components have problems. The power of power adapters is also increasing day by day, so the testing of electronic components is also increasing. If the electronic components used in the power adapter are of poor quality and the PCB wiring is improper, it may increase the probability of failure. Therefore, choosing a high-quality power adapter is very helpful for the stability of laptops.

　　Type of plug

　　Power cord is a widely used type in electrical appliances. Basically, electrical appliances require power cords to be powered on. But many people believe that as long as they use electricity, they need a power cord. The fact is not so. A wire with a plug is called a power cord. There are many types of plugs. Let's take a look at the types of power plugs!

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