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Editor to share with you how to repair the win8 computer motherboard short circuit problem, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

General maintenance ideas of motherboard short circuit:

⑴ motherboard short-circuit fault phenomenon: plug the power supply current directly to 5A, the voltage is low to 0V or close to 0V, some motherboard will have the smell of burning.

⑵ motherboard short-circuit maintenance inspection method:

1. First of all, carefully observe whether the components of each part of the motherboard have traces of discoloration and burning.

Generally speaking, when each component is short-circuited, due to the consumption of large current, it will cause the element to heat too high and appear appearance drum bag or color zoom and so on. If there is a burning element. Judge the function and position of the burning element, and then analyze the cause of the damage.

There are generally two reasons: the ① component itself is damaged, and the ② post-stage short circuit leads to excessive load of the component. After judgment, replace the components.

If the motherboard is still short-circuited after replacement, continue to look down.

2. Set the current threshold of the stabilized power supply smaller to prevent excessive current causing damage to other components of the motherboard, or excessive current components causing danger of heating (hot hands).

You can first set the current of the stabilized power supply at about 1A, then plug in the power supply, gently touch it with your hands, find the heating element, and replace it if you can find it; if you can't find the obvious element, increase the current and keep looking.

3. Repair common short-circuit components.

⑴ ceramic capacitor:

Ceramic capacitor is a multi-layer chip structure, the principle is that two charged conductors close to each other, insulated from each other, will contain the charge. The two ends of the capacitor cannot be connected. The damage and fault of ceramic capacitors is short-circuit breakdown, which is measured by a multimeter with a resistance value of 0 ohms. And the circuit will not be broken because of the increase of current, it will remain in the state of short circuit all the time, and will produce high temperature. The appearance shows that there are signs of corrosion on both ends of the contacts. The color of the ceramics becomes darker or uneven. Generally speaking, the damage probability of the filter ceramic capacitor at the main power supply or the common end is relatively high.

⑵ high and low end MOS tube:

The role of high-end and low-end MOS transistors in the circuit is to reduce the voltage of the DC-DC and convert the voltage of the adapter into the voltage required by the motherboard. High-and low-end MOS tubes are generally N-channel (only a small number of charge-discharge chips will use P-channel), the phenomenon of high-and low-end MOS damage is breakdown. A path is formed by using a multimeter to measure. The common reason is that the G pole of the MOS tube loses the control signal due to the water intake or damage of the power supply control core (the MOS tube can not be powered up directly when there is no power supply chip, otherwise it will directly lead to breakdown damage). If you encounter the failure of MOS tube damage, it is necessary to comprehensively consider the cause of the fault to prevent the replacement of the short circuit, resulting in the burning of the later components.

The above is all the contents of this article entitled "how to fix the short circuit problem on the motherboard of win8 computer". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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