Main causes of computer motherboard failure

main causes of computer motherboard failure:

1. Human failure: Live plug I/O card, as well as in the Board card and plug when the improper force caused to the interface, chip and other damage

2. The environment is bad: static electricity often causes the motherboard chip (especially CMOS chip) to be penetrated. In addition, the motherboard encountered power damage or power grid voltage instantaneous spike pulse, often damage the system board power plug near the chip. If the motherboard is covered with dust, it will also cause a short circuit signal and so on.

3. Device quality problem: Due to the poor quality of chips and other devices caused by damage. Cleaning

The first caveat is that dust is one of the biggest enemies of the motherboard. It is best to pay attention to dust, the brush can brush lightly to the dust on the motherboard, in addition, some cards on the motherboard, chip using the form of pins, often because of the oxidation of the pins and contact poor. Use eraser to surface oxidation layer, reseat. Of course we can use trichloroethylene-volatile performance, is to clean the motherboard of one of the liquids. There is a sudden power off, to turn off the computer immediately, so as to avoid sudden calls to the motherboard and power to burn. Process. Bios

Due to improper BIOS setup, if overclocking can jumper clear place, pick reset. If the BIOS is damaged, such as virus intrusion, you can override the BIOS. Because the BIOS can not be measured by instrumentation, it is in the form of software, in order to eliminate all possible causes of the motherboard problems, it is best to brush the motherboard BIOS.

Plug Swap

Host systems have many causes of failure, such as the motherboard itself or I/O bus of various card failures can cause the system to run abnormally. The use of the plug maintenance method is a simple way to determine the fault on the motherboard or I/O device. The method is to shut down the plug-in board block by piece, each pull out a plate on the boot to observe the operation of the machine, once the motherboard is pulled out after a normal operation, then the fault is due to the board failure or the corresponding I/O bus slot and load circuit failure. If the system boot is still abnormal after unplugging all the boards, the failure is most likely on the motherboard. The use of the Exchange method is essentially the same type of plug-in board, bus mode, the same function of the plug-in board or the same model chip mutual exchange, according to the changes in the phenomenon of fault diagnosis. This method is used for easy to plug the maintenance environment, such as memory self-test error, can exchange the same memory chip or memory to determine the cause of the failure. Watch

Get a defective motherboard first with the eyes sweep, see no burn traces, the appearance of damage, look at the plugs, sockets are skewed, resistors, capacitance pins are collided, whether the surface is burnt, whether the chip surface cracking, the motherboard on whether the copper foil burning. Also want to see if there is a foreign matter falling into the motherboard components. Where there is doubt, you can use the universal table to measure. Touch some of the chip's surface, if abnormal hair hot, can change a chip to try. (1). If the line is broken, we can use the knife cut off the paint scraping clean, in the exposed wire place wax, and then with a needle down the lines to the candle, then the above is dripping silver nitrate solution. Then you will use a universal table to confirm whether the breakpoint is connected properly. Just like this one, the breakpoint is ready. Note that one of the company, do not be impatient, like the motherboard on some places on the line between the distance is very small, can not get a short circuit.

The main reason for the failure of additional computer board:

The motherboard causes the breakdown, generally has three aspects: first, the component quality causes the breakdown. This kind of fault in some inferior board is more common, the main point is the motherboard of a component due to its own quality problems and damage, leading to a part of the motherboard function can not be used normally, the system can not start normally, self-test process errors and so on.

Capacitor Burst award It's something that happens on some inferior motherboards.

The second is the environment-induced failure. Due to the external environment caused by the fault, generally refers to people in the unknown situation or unpredictable, irresistible circumstances caused. such as lightning, mains power supply instability, it may directly damage the motherboard, in this case, people generally have no way to prevent, the external environment caused by another situation, is due to temperature, humidity and dust caused by the fault. The symptoms of this situation are: Frequent crashes, reboots or sometimes can not boot, and so on, resulting in unstable performance of the machine.

Multiple illegal plugging of memory on the motherboard can cause slot distortion

[/font] Three is man-made failure. Some friends, computer operation Knowledge knows less, in the operation does not pay attention to the operation of norms and safety, so some parts of the computer will cause damage. such as live Plug and pull equipment and board, installation equipment and board when the excessive force, resulting in equipment interface, chip and board, such as damage or deformation, which caused the failure.

There are many components on the motherboard, so fault diagnosis is rather troublesome

When a computer fails, we first have to judge the source of the fault, especially such as the main board of the larger equipment, the external performance can not be very clear to judge the source of the fault, here will need to use replacement to examine the source of the breakdown in detail. You can take the suspected parts to a good computer to try, but also can put the good parts to the faulty computer to try.　Such as: There is a self-test times wrong or capacity is not correct, you can use this method to determine the real culprit causing the failure. When the motherboard is identified as a failure, we can further troubleshooting the motherboard and processing. In general, we can deal with the motherboard through cleaning method, observation method and software diagnosis method.

One is to clean up the law. When we find that there is too much dust on the motherboard, we need to clean the motherboard first. Due to the motherboard dust too much, coupled with dust adsorption in the air moisture, it is very easy to cause the motherboard does not work correctly, the use of brush to clear the dust on the motherboard. In addition, the motherboard is generally connected with a lot of external board cards, these cards of the gold fingers may be oxidized, resulting in contact with the motherboard is not good, this problem can be wiped off the surface of the oxide layer.

[Verdana] cleaned the dirty motherboard with a brush

Second, the observation method. The main use of "look, touch" skills. In the case of power off, to see whether the components are plugged in correctly, capacitance, resistance pins are in good contact with the surface of each component is burnt, cracking phenomenon, each circuit board of copper foil is burned traces. At the same time, you can use your hands to touch some of the surface of the chip to see if there is a very hot phenomenon.

The third is the method of restoration. For motherboards that have changed the motherboard BIOS settings or CPU overclocking, we can troubleshoot some common failures by restoring the motherboard's default settings. In particular, the crash, restart the fault, usually due to the CPU after overclocking caused by the CPU to the default frequency after the general failure will disappear.