First, if there is a problem with the original power adapter that cannot be repaired or it is too late to repair, you can replace the adapter with another adapter first, as long as the output voltage and power are roughly equal. There is a voltage regulator circuit in the notebook, so don't worry too much about the output voltage mismatch. The first step in the repair is to prepare the tools, you will need a multimeter, screwdriver and soldering tools.

 

Second, the power adapter has four plastic caps, try to avoid damage to the adapter shell. Damage to the casing can cause problems such as increased electromagnetic radiation, which affects the stability of the machine. If the casing is damaged, try to repair it. If it was not powered from an external power source during removal, try connecting the battery at this time. If it boots normally, there may be a problem with the power cord or adapter. It's a good idea to check the solder legs first after opening the exterior and opening the shield. , which can be observed with the naked eye. The circuit is intermittent, usually due to poor contact. Then check the power cord for problems with a multimeter to simplify maintenance.

 

Third, in the process of measurement and testing, if it is found that the resistance pins are soldered, then use welding tools to repair them, re-install the power adapter, and start the test. The problem is solved. It should be noted that if there is a problem with a certain capacitor during the detection process, you can buy a capacitor with the same model and capacity (the price is about 5 yuan), then solder the problematic capacitor down, and solder the new capacitor on. That's it. If you find a problem with the IC power chip, you can solve it in the same way. Of course, since the IC chip is definitely one of the most important electronic components in the power adapter, the capacitor is too complicated.

 

Fourth, in the maintenance process of selecting the power adapter equipment for the current power adapter equipment, because the current power adapter has adopted a large number of stickers.

 

For chip components, once the component fails, the maintenance is even more difficult. The power of the power adapter is also increasing day by day, which puts more and more challenges on the electronic components. If the quality of the electronic components used in the power adapter is not good enough and the PCB wiring is improper, it is likely to increase the probability of failure. Therefore, buying a good quality power adapter is very helpful for the stability of the notebook.

 

Fifth, check whether there is any problem with the capacitor, resistor, and inductance. If the capacitor has a bulge, it is best to replace it in time.