Laptop power supply repair method

Now that technology is more and more developed, what electronic products have been researched, there are computers, desktop Power Supplies and laptops, as well as netbooks, and what, desktop computers have power supplies that may be in use during a period of use. Probably because the quality of the desktop Power Supply is not good. Laptops also have a power supply commonly known as a notebook power supply, but the power supply of the notebook power supply will be damaged after a period of use is also because the quality of the power supply is not good, how to repair the notebook power supply is broken?              

Let's share with you how to repair the notebook power:

The laptop's power system is the third most important component behind the CPU and its motherboards and displays. The power system includes a power adapter, a rechargeable battery, and a power management system. Don't think that the power supply is a high-tech product. In fact, the Laptop Power Supply is now a very mature technology. Small workshops in some parts of the country can produce relatively high quality products. Although notebook power is a low-tech product, there are many problems. The power supply mentioned below, unless otherwise specified, refers specifically to the notebook power supply. When buying a notebook power supply, you must choose a manufacturer that produces notebook power. Recently, I found that the laptop cannot be turned on when using an external power supply. It can be used smoothly.
At any time, from easy to difficult, from the principle of external entry, the author first uses a multimeter to detect the power line, that is, the eight-shaped line in Figure 1, the author found that the power line is in an open state. The author thinks again and again that it is not very meaningful to open the maintenance of this power cord (mainly considering the disassembly will seriously affect the appearance of the power cord, destroying the overall coordination of the notebook), so consider looking for alternatives, stumbled upon this line and Almost on the radio, it can be said to be completely versatile. Because both of them are available, they are found to be replaced by a normal use.
However, the new problem quickly appeared again. The fault manifested that the laptop often loses power, and the performance is good or bad. Sometimes even moving the machine a little, it may cause the notebook to lose power. During use, screen flickering and the like often occur. The two situations are combined. Under the premise of eliminating the failure of the LCD screen itself, the author initially determined that there is a problem with the power supply circuit, so the author turned his attention to the power supply. Generally speaking, the power supply circuit in the notebook computer is not prone to problems. There is a problem with the power supply circuit. The general problem is still on the power supply.
How to repair laptop power
1. Appearance power supply is generally composed of a casing, a power Transformer and a rectifier circuit. If the notebook power supply is generally a plastic case, there is no iron case.
2. The nameplate should say that it takes a lot of effort to disassemble the power adapter housing. The casing of the notebook power supply is quite tightly integrated, and it is almost impossible to open it all at once. It is impossible to say that you want to restore the original after opening the case. This can be used as a standard for us to identify whether the power supply is genuine, but it can be opened very quickly if it is an experienced engineer. If you are an inexperienced engineer, you can consult an experienced engineer.
3. The role of the metal shield metal shield is self-evident, because the notebook power supply is made of plastic shell without iron shell
4. Internal overview Look at the internal power supply, in fact, there is no mystery, and there is no big difference between ordinary switch and voltage regulator circuit, that is, some capacitors, resistors, inductors, switching diodes, power core chips are just not so complicated notebook power supply. The power is about sixty or seventy-six W, and the heat generated inside is mainly radiated through the plastic casing. The surface temperature of the power adapter is still quite high, and the inside of the adapter is a standard stove, which is estimated to be 80 °C. Therefore, I suggest that when using a laptop, try not to stack things on the power supply, especially flammable materials.