Solution: We need to disassemble the power supply, then check whether the built-in emi circuit is intact, and then check the mica, plastic diaphragm and capacitor. If there is something wrong with any original parts, please replace them. For example, if the plastic film is damaged, we need to buy high-temperature resistant materials and make a film ourselves.
2. The reason for the leakage of the chassis: the motherboard is damaged.
Solution: Under normal circumstances, if we feel obvious numbness when touching the chassis, it means that the motherboard is damaged by leakage. At this time, let's minimize the system first, so as to reduce the damage of accessories during testing. Then, we need to turn off the computer, check whether the cable touches other motherboards, and finally remove the motherboards and replace them.
3. Causes of chassis leakage: the chassis is damaged.
Solution: when we disassemble the chassis, we will find a circuit board inside the chassis, which can connect usb, switch, audio and signal. So we need to check whether the wires on the circuit board are all insulated, and the short circuit of components will also cause leakage and burning. At this time, it is necessary to use power tools instead.
4. Causes of chassis leakage: external wiring.
Many times, in fact, the leakage of the chassis does not mean that it is the cause of the chassis, or it may be because other electrical appliances are too close to the chassis and may touch the wires on one side of the chassis, which will lead to leakage. During maintenance, we don't need to disassemble the chassis, we just need to check the wires outside the chassis to see if the insulation skin is damaged. If the metal part is exposed, it needs to be replaced in time. The wire we need to buy is preferably made of nylon mesh, so that there will be no leakage.
In life, we should learn to develop good hygiene habits. You should know that there will be many wires next to the computer desk, so don't leave lighters and cigarette butts in these places, otherwise it will cause serious security risks! Of course, it is necessary to clean the dust outside and inside the chassis frequently, which will not only cause excessive noise in the chassis, but also cause slow startup. When cleaning the chassis, we'd better use a hair dryer, or disassemble the chassis and wipe the dust with a clean rag.