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Hello everyone, in this lesson we will take a look at the overhaul of unrecognized sound cards

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Unrecognized sound card means that the sound card cannot be seen in the device manager

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As we said in previous lessons, as long as the digital part of the sound card is working properly,

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the sound card can be recognized during the device management session

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Therefore, if you do not recognize the sound card device,

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the key point is to check the working conditions of the digital part of the sound card.

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The working conditions of the digital part of the sound card are relatively simple,

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that is, the power supply and the 5 sound card buses of the sound card

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Of course, there is a small probability that the failure to recognize the sound card is caused by software.

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According to the maintenance principle of soft first and then hard,

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when we encounter an unrecognized sound card failure, we should first use the test system disk

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Replace all the system and drivers to see if it can be recognized

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If the system is replaced and the sound card is still not recognized,

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we have to check the power supply and the bus

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When we check the power supply of the sound card,

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we must check all the power supplies of the sound card

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Because the power supply of the sound card is more, so be careful not to miss the check

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If the power supply is normal, we will measure whether the 5 data buses of the sound card are normal

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These 5 data buses are connected to PCH

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We generally have to remove the sound card to measure the ground values of the five data buses.

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Because these data lines generally pass through a resistor

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If there is a problem with this resistor, it will cause the failure of the sound card

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If you do not remove the sound card for measurement, then measure these data lines, it will always have a value

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Therefore, it is recommended to remove the sound card and then measure whether the ground value is normal.

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If the power supply and the ground value are normal, we will replace the sound card for testing

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The damage rate of the sound card is still relatively high

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If we have completed all these processes, but the sound card is still not recognized,

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then it may be the reason of PCH or BIOS

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As we said before, a problem with the BIOS may cause most of the malfunctions on the mainboard

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The failure to recognize the sound card may also be caused by the BIOS

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Of course, it may also be caused by PCH damage, because the sound card bus is connected to the PCH

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If the PCH is damaged, the sound card bus will not work, and the sound card will not be recognized

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The above are the maintenance ideas for not recognizing the sound card