How to repair the leakage of computer case? Solution of water leakage in computer case

Have you ever encountered such a situation, that is, when touching the computer case shell, you will feel slightly paralyzed, and in severe cases, you will feel obvious electric shock in an instant. Why? This is the problem of water leakage in the computer case. What can be done to repair it? Generally speaking, there are many reasons for chassis leakage. This article introduces some solutions for everyone.

The specific method is as follows:

Solution 1:

1, when we use the computer, we feel that the chassis leaks electricity. In fact, there are some external objective reasons, such as static electricity on us, or a pile of wires under the chassis touching some live equipment, which will cause leakage. This situation is relatively simple to check, as long as you touch the metal object and remove the charged equipment. Let's talk about some hidden leakage hazards that are really hidden inside the chassis.

Solution 2:

1 First of all, the power supply, which is one of the accessories most likely to cause electric leakage in the chassis, because the components inside the power supply are exposed and the space is relatively narrow. Therefore, if the manufacturer fails to pass the component layout or welding process, the power supply itself will leak electricity, and the power supply and the chassis must be in close contact, so there will be the phenomenon of chassis leakage. In fact, manufacturers often use plastic film or mica to cover the inside of the power supply near the shell, and some wires and components may even be insulated. However, if the power supply is overused, or the bad weather environment such as wet weather destroys the good "environment" inside the power supply, leakage will also occur.

2. The high-quality power supply of well-known manufacturers will be equipped with EMI circuits when the commercial power enters the power supply. EMI circuit can not only better ensure the "purity" of the commercial power entering the power supply, but also play a good role in preventing leakage, because the Y capacitor in EMI circuit is a kind of leakage capacitor. After the computer is electrified, the electromagnetic radiation generated by electronic components will be conducted to the ground through the ground wire, thus reducing the harm to the human body. If the lower power supply is omitted,

3. The wiring inside and outside the platform chassis is also the culprit of easy leakage. For example, the power supply meets the power supply requirements of various accessories, or the SATA data cable or the power supply cable connected to the electrical socket outside the chassis is damaged due to long-term use, thus destroying the original shielding protection measures, and these damaged exposed metal wires just touch the chassis, which also makes people feel electric leakage.

4. The board card will also generate leakage. In the application process, the motherboard, graphics card, etc. It is possible to load a radiator with large volume and weight, resulting in PCB deformation. After deformation, the components will contact the chassis, resulting in leakage, or some capacitors on the board are damaged, and the electrolyte will form conductive strips to guide the formation of leakage on the chassis.

Solution 3:

1. Every accessory inside the platform may have leakage, which may cause us to touch the chassis outside the platform and feel leakage. This kind of leakage actually comes from the electrical plug-in board used by users, and there is no perfect grounding design, which leads to the leakage effect of components inside the platform, and it is impossible to guide the leakage to the earth through grounding, thus reducing the risk of leakage.

Solution 4:

1. When leakage is found, we must first confirm whether the electrical plug-in board we use has a good grounding design. If it is not replaced immediately (including the common wall-mounted electrical sockets at home), with good grounding, even if there is leakage, the damage and loss can be minimized.

2. Open the chassis, check the wiring inside and outside the chassis to see if the insulation package is damaged. If the metal part of the wire is exposed outside other accessories and chassis, replace it immediately. Or directly choose the wire wrapped with nylon net, which can also play a better insulation effect.

3. The grounding problem of wires and sockets has been eliminated. In view of the previous analysis, the power supply is the biggest culprit causing the leakage probability of the chassis. Let's start with the power supply, disassemble the power supply, and see whether the EMI circuit of the power supply is complete, whether the plastic film or mica film between the spacer and the metal shell of the power supply loses its insulation effect, and whether there is Explosicum in the internal capacitor of the power supply. If there is a problem, we can make a high-temperature resistant plastic film ourselves to form a shielding barrier between the components and the power supply shell.

4. Finally, check the motherboard and graphics card inside the chassis to see if there is any PCB board deformation that leads to direct contact with the chassis. It is best to use the minimization system as the inspection method. On the one hand, it makes the platform simpler and easier to judge, on the other hand, it can avoid unnecessary damage of hard disk and other accessories in the test process.

5. Finally, check the chassis itself. Generally, behind the front panel of the chassis, there is a PCB circuit board connected to the motherboard for audio, signal, switch and USB expansion. We also need to check the circuit board and the wires connected to the circuit board for insulation failure, short circuit and burning. If yes, we can use simple electrician knowledge and tools for maintenance or replacement.

6. Of course, we can also make an all-round judgment by putting the chassis in a dry position (for example, the original position is wet and easy to cause short circuit of wires) and changing insulated shoes at the bottom, and finally find out the culprit of leakage.

7, for the general problem is not serious leakage, novice friends can also take a wire to connect the chassis with the metal grounding body, let go of leakage. Pay attention to the ground terminal. Can be connected to the radiator, but also can be connected to large-area metal grounding bodies such as aluminum alloy windows. The effect of directly grounding the floor is not good, and there may be a feeling of leakage in the chassis. Therefore, it is best to connect grounded metal objects.

Solution 5:

1. Although the low-voltage power consumption required by various accessories in the platform will not exceed 12V in theory after power supply current conversion, it belongs to the safe power consumption range that people and land can bear. Only long-term contact will bring adverse reactions to our nerves, physiology and so on. But these are just normal situations. If some components in the platform or between components are short-circuited, then very large voltage and current will accumulate from the short-circuited components themselves to the chassis in an instant, which may cause life-threatening harm to human body. Therefore, when we find chassis leakage, we should try our best to investigate it immediately to avoid more serious leakage.

Don't worry about water leakage in the computer case, you can solve it by referring to the above five methods.