【 Weak current College 】 motherboard failure of a few basic checks and treatments

Motherboard produces the cause of the failure, generally have three aspects:

1. human failure

Some of my friends PC operation knowledge know less, in the action without attention to operational practices and safety so that some parts of the computer will cause injury. If the plug devices and cards, the installation of equipment and the card is excessive, resulting in a device interface, chip and Board and other damage or distortion, causing failure.

2. the environment caused by the fault

Because of external environment caused by the fault, generally refers to people in unknown or unpredictable, in cases of force majeure. Such as lightning, AC power supply is unstable, it may direct damage to the Board, in which case it is generally not prevention; external environment of the other case is due to temperature, humidity and dust caused by the failure. This situation has manifested symptoms: frequent freezes, restart, or sometimes post sometimes does not power on, etc., thereby causing the performance of the machine.

3. the quality of components result in the failure

This is one of the components of the motherboard due to quality problems and damage. This failure will result in the Board of the general part of the function does not use, system will not start normally, post report errors in the process.

Motherboard failure is often manifested in system startup failure, nothing is displayed on the screen, sometimes boot and sometimes can't wait to start Visual judgment of symptoms. The Board failed to check the maintenance, the general use of "a look at, listen to the second, three smell, four touch" maintenance principles. Is the observation of the symptom, listen to the alarm sound, smell is the unusual smell, touch certain parts for perm, etc. The following are some common motherboard repair methods, each method has its own advantages and limitations, usually a combination of several methods.

1. clean method

This method is typically used to address the Board on dust, dust, static electricity causes the motherboard does not function with the available brush clean the dust on the motherboard. In addition, the Board generally add a lot of external card, the card edge connector may be oxidized, resulting in poor contact with the motherboard, this problem available Eraser wipe the surface oxide layer.

2. the observation method

It is mainly used to "look, touch" technique. In turn the power on, look at each part is patch correct, capacitor, resistor PIN is good, all parts in contact with the surface would have burned and cracking phenomenon, various Board of copper foil is burned. At the same time, you can use the hand to touch the surface of some chips, and see if there is a very fat burn.

3. substitution method

When some of the symptoms are not sure whether it was caused by what parts, parts may be suspected by substitution method to troubleshoot. You can put the suspect parts get good computer looks on, but also the good parts received the failed computer looks on. For example: memory in the post times wrong or capacity is not, you can use this method to determine the true culprit caused by failures.

4. software diagnosis method

Here we usually means through random accompanying Diagnostics or the system test to test the software. Generally used to examine the various interface circuit failure.