Symptoms of a broken laptop motherboard

I don't know what kind of motherboard you have, sometimes it's not the motherboard's problem, you reinstall the system and try it. You should first suspect the memory, unplug and clean the gold finger before plugging it back, not clean the graphics card and all the fans, then check the power supply, and finally check whether the motherboard is broken.

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Analysis of the reasons for the breakdown of the notebook motherboard:

1. The jumper is plugged in incorrectly. Among the 5 jumpers to be plugged in, 2 (hard disk lights, restart lights) are polar, if this plug is reversed, it will burn the motherboard or hardware.

2. If you are not careful, when you install the machine, there are some metals that you don't pay attention to, hang on the motherboard, and when the machine lights up. It will burn out the motherboard. Or maybe the machine is running. Accidentally got the water in (of course, this is very unlikely).

3. Filter capacitor.

Burnout. Although it is only a capacitor, a capacitor is mainly used in the motherboard to ensure the stability of voltage and current (acting as a filter). Let's not ignore it. Because we know what it does, you can imagine the effect of capacitance on the motherboard (the effect of voltage and current on the motherboard).

4. In the previous PS, if you don't shut down the mouse or keyboard directly, it will also burn out the motherboard. But now that the new motherboard supports hot swapping, that's fine.

5. The quality of the power supply also has to be considered, if the voltage and current are unstable, the motherboard will also be greatly affected. It directly causes the circuit to burn out.

6. Short circuit caused by excessive dust or moisture may cause the circuit and motherboard to burn out. (Clean up your own stuff more regularly!) )

7. Overclocking. If you overclock it, it will also increase the load on the motherboard, and if you exceed the limit, it will also burn out. However, the development of hardware devices is quite fast, and overclocking is a thing of the past.

Common maintenance methods for motherboards.

1. Observation.

First of all, check whether the motherboard has traces of burnout, whether the appearance is damaged, check whether the plugs and sockets are skewed, whether the resistors and capacitor pins collide, whether the chips are cracked, and whether the copper foil on the motherboard is burned. Electrolytic capacitors on the motherboard.

There are many cases of damage, and it is easy to find through observation, once there is a problem, you can find a matching capacitor to replace it, and the problem can be solved.

2. Cleaning method.

First, use a brush or other cleaning tool to remove the dust on the motherboard to solve the short-circuit fault caused by excessive dust, and then use an eraser to wipe off the oxide layer on the surface of the board to avoid the board from malfunctioning due to poor contact between the board and the motherboard.

3. Plug and swap method.

This method can determine whether the fault is on the motherboard or on the i 0 device. The specific operation is to exchange the same type of plug-in board or chip, and then judge the fault according to the change of the fault phenomenon. It is mainly used in easy-to-swap maintenance environments, such as memory self-test errors, and the same memory module can be exchanged.

to determine the cause of the failure.

4. Software diagnosis.

Software diagnostics is a method of auxiliary hardware repair of the motherboard through the diagnostic program or test software that comes with it, and the principle is to identify the fault location by sending data and commands through the diagnostic software to read the status of the line and chip. This method is suitable for checking various interface circuit faults and various circuit faults with address parameters.