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Hello everyone, in this lesson we will take a look at the failure of the network card to connect to the Internet

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The fault that the network card cannot access the Internet means that the network card driver is normal,

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but after plugging in the network cable, it shows that the network cable is not connected,

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or it is connected but cannot access the Internet

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Here we should pay attention to one point,

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the failure of the network card to access the Internet is likely to be caused by software,

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that is, the system settings are caused by problems.

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Therefore, when you encounter a failure to access the Internet, you cannot repair the hardware blindly,

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and you must first eliminate the software.

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The failure to access the Internet caused by hardware is generally due to abnormal operation of the network card,

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or problems with the interface or network transformer.

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For this kind of failure, we still need to be soft first and then hard, first easy and then difficult

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Clear the CMOS first, and use a test disk to test whether the fault disappears

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If the system and drivers are replaced, if it still does not work,

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it means that the fault is caused by the hardware.

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First check whether the network cable interface is normal

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Because the pins of the network cable are often damaged due to wrong plugging and unplugging by users

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For example, the network cable interface on the right

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It can be seen that its first shrapnel and fourth shrapnel have not rebounded in place

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This may cause the network cable to fail to connect

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After observing the network cable interface,

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we also need to observe whether there is physical damage near the network card

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If there is physical damage, it is the fastest to repair

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After checking these, we will check the circuit next.

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To check the working condition of the network card,

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check its power supply and whether the crystal oscillator is normal

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Under normal circumstances, the network card can be recognized,

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and the PCIE bus of the network card is basically no problem.

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But sometimes, the low power supply will lead to failure to connect to the Internet

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If all of these have been tested and there is no problem,

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it is recommended that you directly replace a network card for testing.

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If it still doesn't work after changing the network card,

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then we will replace another network cable interface or network transformer

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Most of the mainboard's network cable interface now has a built-in network transformer.

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The above is the maintenance of network card failures that cannot access the Internet