The internal reason is the most common situation that leads to the leakage of computer chassis, so which hardware inside the computer chassis is prone to leakage? In fact, this is not difficult to find, just find the hardware that contacts the chassis. For example, the power supply is the most likely to lead to the leakage of the chassis, and another is that the motherboard is not installed in place, or some component pins touch the chassis shell, which is also easy to leak electricity.
One of the key points of computer case leakage: power supply (the biggest culprit)
Solution: Disassemble the power supply to 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 has lost its insulation effect, and whether the internal capacitor of the power supply has Explosicum. If there is a problem, you can make a high-temperature resistant plastic film to form a shielding barrier between the components and the power supply shell. If it cannot be solved, please replace the power supply immediately.
The second key to computer chassis leakage: motherboard
Solution: When the motherboard leaks electricity, people feel strong, almost similar to leakage, and there will be obvious tingling. Moreover, the leakage of the motherboard will cause all components to be charged.
At this time, we'd better use the minimization system, on the one hand, to make the platform simpler and easier to judge, on the other hand, to avoid unnecessary damage to hard disk and other accessories during the test. First observe whether all capacitors on the motherboard are complete, and then check whether other cables touch components on the motherboard. It is best to remove the motherboard. If it is still charging, the wiring inside the motherboard may be deformed. It is recommended to replace the motherboard.
The third key to computer chassis leakage: the chassis itself.
Solution: Generally, there is a PCB circuit board behind the front panel of the chassis to connect the motherboard 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.
The fourth key of computer case leakage: external wiring
Sometimes the computer leakage is not necessarily caused by the inside of the computer case. For example, if the case is placed too close to other electrical appliances or the case encounters broken wires, it belongs to external leakage.
Solution: Open the chassis, check whether the wiring inside and outside the chassis, the insulation package is damaged, and whether the metal part of the wire touches other accessories and chassis, and replace it immediately. Or directly choose the wire wrapped with nylon net, which can also play a better insulation effect. In daily life, we should pay attention to the correct binding of computer wiring harness and power cord, form the habit of loving cleanliness, and don't have many wires lying all over the floor.
Tips:
1, for the leakage that is not serious in general, friends can take a wire to connect the chassis with the metal grounding body, and just discharge the leakage. Pay attention to the grounding end, which can be connected to the radiator or a large area of metal grounding body such as aluminum alloy window, and the direct grounding effect is not good.
2. It is best to put the chassis in a relatively dry position to avoid short circuit of wires caused by a relatively humid environment, so as to prevent problems before they happen.
Generally speaking, the new computer case will not leak electricity. Only when it is used for a long time, the aging case will have a high probability of leakage.
The back of the computer case leaks electricity, which makes it feel numb. What is the reason?
First of all! You have to judge whether it is leakage or static electricity. The way to judge is to connect one end of a wire to the water pipe before you touch the computer, and then connect the other end to the computer shell. Then you touch it with your hand. Nothing is static electricity, otherwise it is leakage. If it's electric leakage, you can't handle it. You'd better resist repair!
If it is static, see if your chassis plug is a three-pin plug. If so, it is estimated that the ground wire of your home line is not connected properly. In this case, you have two choices: 1 Ask an electrician to check whether the ground wire in your home is not installed or the ground wire connector in the socket is loose (if you are familiar with the wire yourself, it is not a problem). 2 Find a wire and screw it on the screw at the back of the chassis, and connect the water pipe at the other end (the water pipe is well grounded, if you only
2: The grounding wire is all right, and I have touched the chassis with my shoes on.
Because of the potential difference, static electricity is generated. Just like the water pressure difference, the water in the kettle is poured into the cup because of the water pressure difference, which has nothing to do with whether the cup wears the bottom (shoes).
3: My monitor won't leak electricity for the time being.
That's because the display case is not easy to accumulate static electricity.
4: Also, when I plug in the USB flash drive, all the metal parts of the USB flash drive have electricity. .......
Of course, the metal part will be connected with the metal part of the chassis.
I'll sort it out again and just answer these questions.
A: How did you deal with this leakage before? Is it better to use metal wire to ground or directly change the power supply?
My home is directly connected by the power supply bureau, and then all sockets, lamps and appliances are connected by ground wires when decorating, so this phenomenon will not happen and it has never happened.
I don't need wires. Can I put the chassis on the ground? I live upstairs, and I dig with cement ...
No, it won't work if it's dry. It is estimated that your concrete floor will not be very wet.
C: Will the leakage of this case cause the leakage of my monitor?
No, the monitor surgery is plastic surgery! It's the same inside. There may be static electricity.
What do you mean by chassis leakage? Will the leakage of the chassis burn out the hardware?
There are two cases of chassis leakage. One is that the static voltage of the cabinet is too high due to the long-term rainy and humid air, and it feels numb! In this case, as long as we pay attention to strengthen ventilation, ensure that the indoor air is as dry as possible, and clean up the dust in the chassis in time, especially the dust on the motherboard and power supply. Generally speaking, it has little impact on the host and hardware. However, it should be noted that before starting the machine, it is necessary to check whether the dust in the chassis has been removed to ensure that the short circuit will not be caused by dust and moisture!
Second, the power supply or motherboard has a slight grounding phenomenon. The general reason is that the grounding capacitance of the power supply line or the * * * component of the motherboard is slightly damaged due to insulation degradation or dust accumulation after long-term use in humid or high-temperature environment. At this time, the inductance of the chassis is obvious, and sometimes it can be lit with an electric pen. This situation should be noticed and the reasons should be found out in time. Otherwise, it is easy to damage the hardware, such as burning the chassis of the motherboard graphics card, and it is impossible to connect the ground wire to the ground, not to mention the zero wire (ground wire) of the power supply. Otherwise, when the second situation mentioned above occurs, the possibility of equipment damage will increase.
Is the leakage of USB port and chassis the cause of chassis or power supply?
The first is the poor quality of power supply. The low-voltage part of power supply is not well isolated from 220V alternating current, and the shielding effect is not good, resulting in induced leakage. This situation is generally not a real leakage, and sometimes the problem can be solved by changing the positions of the two wires of alternating current!
Secondly, the power supply is poorly grounded or has no grounding wire at all, which does not meet the current power supply specifications. The computer must be well grounded when working to ensure its stability. At present, the indoor power supply in the building is single-phase electricity, and three wires-zero wire, live wire, ground wire and socket are connected. When facing the socket, it should comply with the provisions of "left zero and right fire, grounding above".
Your computer must be poorly grounded. If the grounding is good, there will be no electrostatic induction. Good grounding, even if it really leaks electricity, will also lead to the leakage protector working and automatically cut off the power supply! Therefore, for your safety and the stable work of your computer, please check the grounding of your computer (three-wire socket and plug must be used).
Is the leakage of computer case harmful to computer hardware?
Leakage of computer shell refers to the feeling of "numbness" and "electric shock" when the hand touches the shell after the computer is connected to the power supply. When the electric pen was tested, it was found that the neon tube in the electric pen was red, which was leakage.
What do you mean by chassis leakage? Will the leakage of the chassis burn out the hardware?
Chassis leakage
The problem of chassis leakage is common. In most cases, the safe voltage that our human body comes into contact with is less than 36V, so it is not easy to detect at ordinary times. Although the voltage used by the computer is less than 12V, the general computer leakage will not cause harm to human body, but it is also a terrible thing if it is often easy to "get an electric shock".
Will the leakage of the chassis burn out the hardware?
Although the leakage of the chassis generally does not cause harm to human body, many netizens worry that the leakage of the chassis may burn out the hardware. Is this possible?
There are two cases of chassis leakage. One is that the static voltage of the cabinet is too high due to the long-term rainy and humid air, and it feels numb! In this case, as long as we pay attention to strengthen ventilation, ensure that the indoor air is as dry as possible, and clean up the dust in the chassis in time, especially the dust on the motherboard and power supply.
What do you mean by chassis leakage? Will the leakage of the chassis burn out the hardware?
Will the leakage of the chassis burn out the hardware?
Generally speaking, it has little impact on the host and hardware. However, it should be noted that before starting the machine, it is necessary to check whether the dust in the chassis has been removed to ensure that the short circuit will not be caused by dust and moisture!
Second, the power supply or motherboard has a slight grounding phenomenon. The general reason is that the grounding capacitance of the power supply line or the * * * component of the motherboard is slightly damaged due to insulation degradation or dust accumulation after long-term use in humid or high-temperature environment. At this time, the inductance of the chassis is obvious, and sometimes it can be lit with an electric pen. This situation will attract attention, and it is necessary to find out the reason in time, otherwise it is easy to damage the hardware, such as burning the motherboard graphics card.
The chassis leaks electricity, so it can't be grounded with a ground wire, let alone the 0-wire (ground wire) connected to the power supply. Otherwise, when the second situation mentioned above occurs, the possibility of equipment damage will increase.
To put it simply, the general case leakage will not damage the computer hardware, but if there is too much dust or humidity inside the case, it may affect the life of the hardware, so it is necessary to attract the attention of computer users, and it is best to find out the cause of the case leakage and solve it.
What is the reason for the leakage of computer mainframe shell?
What is the reason for the leakage of the main chassis?
1. The static voltage of the cabinet is too high due to the humid air.
If it is rainy for a long time or the air is humid, it will lead to high electrostatic voltage in the computer case and numbness in the hands! If this is the case, it is recommended to strengthen indoor ventilation. You can put desiccant in the main chassis, and then clean the dust of the hardware in the chassis in time, especially the motherboard and power supply.
2. The pins of some hardware components touch the chassis.
Find the hardware, such as power supply, which is most likely to cause leakage in the chassis. In addition, the motherboard is not installed in place, and the chassis deformation causes the pins on the back of the motherboard to touch the chassis shell, resulting in leakage of the chassis.
3. The main chassis leaks electricity because the power plug has no grounding wire (mostly).
I suggest that you give priority to this problem. The leakage of the main casing is mostly caused by the lack of grounding wire in the power plug. We only need to connect the chassis with one wire, and then connect the other end to the bottom or wall.
What's wrong with my computer case leaking? What should I do?
Ask an electrician to check and make sure that the ground wire is installed in the home circuit. The expansion board is made by a big factory and the ground wire is in good contact.
How to check the leakage of computer host?
The three respondents just now are probably not electrical majors, and their answers are not correct. The leakage of the main chassis shell has nothing to do with the motherboard, nor with other accessories and boards on the motherboard. The key point is whether the power ground wire is normal.
At present, the commonly used computer power supply is ATX power supply, which technically belongs to parallel switching regulated power supply. Its primary and secondary sides are completely electrically isolated, and its maximum output voltage is only 12V. That is to say, under normal circumstances, even if you directly touch any circuit on the motherboard with your hands, you won't feel electric shock. If you can feel the electric shock, it is obvious that there is voltage on the secondary side bus, and the secondary side bus is normally grounded through the power ground wire. If the power ground wire fails or it is electrified, the whole chassis will be electrified. So you should focus on checking whether the ground wire of the power socket connected to your chassis is normal. If the grounding wire is normal, check the inside of the power box. Problems like this, 99% are grounded or charged. Because electrical appliances can work even without grounding wire, sometimes electricians will cut corners and connect this wire less. There is a small capacitor between the ground wire and the live wire in the power box, and there is also a capacitor of the same size between the ground wire and the zero wire. Therefore, if the ground wire is suspended, there will be a voltage of about 1 10V, and the ground wire is directly connected with the metal shell of the chassis, so the whole chassis has the feeling of electric leakage.
What should I do if the computer case leaks electricity?
See for yourself if there is any contact between the motherboard and the chassis. And power cord, etc. (I feel that as long as I don't buy a computer shell that is too junk, I generally don't have it. Even if you encounter it, you can stick it all over the chassis with sealing tape, so that it won't conduct electricity. There is a case on the Internet where a person's feet were electrocuted by a leaking box. I don't know if it's true or not. You'd better be careful yourself