First, the common faults of the audio system Although there are many faults in the audio system, but the simple summaries are: there are several situations such as not being able to sound normally, insufficient volume, loud noise, and compatibility problems.
(1) Can't sound normally When you encounter this kind of situation, don't rush to open the case first. You should check it step by step from outside to inside and from soft to hard. The steps are as follows:
1 Identify the fault location and check if the hardware wiring is correct:
Since any one of the sound card and the speaker is not working properly, it may cause the malfunction of the sound, so the fault location should be determined first. You can insert the input plug of the speaker into the headphone jack on another audio source device or the optical drive panel for audition.
If the speaker can't make a sound, then there is a serious problem in the internal power amplifier or power circuit. At this time, the specific inspection and maintenance can be carried out according to the actual situation. If you are not well versed in electronic maintenance technology, it is best to be handled by professional maintenance personnel.
If the speaker is playing normally, please check if the speaker plug is plugged into the SPK jack on the sound card, if there is a short circuit or open circuit in the connection cable, if everything is normal, you can continue the next check.
2 Check the DMA, IRQ and I/0 address parameters of the sound card:
When the system installs the sound card driver, the installer will select the default values ​​of DMA, IRQ and I/O address parameters for installation, but sometimes this default value will conflict with other devices, resulting in the sound card not sounding properly. At this point, you can select the "Start → Settings → Control Panel → System → Device Management → Properties" tab, which will display the resource usage of all hardware devices in the computer, including IRQ, DMA, I / O and There are four types of "memory", we can select and view separately. For example, if we select the IRQ class system resource, we can display the interrupt number that the system has now assigned. At this time, if the IRQ resource of the sound card is found to be in conflict with other devices, it can be solved by manually adjusting the sound card to select an idle IRQ. However, this situation is less common on the integrated AC 97 specification soft sound card.
3 drivers are not compatible:
Due to the high stability of the Windows XP system, many people choose to upgrade or install the system completely. However, Windows XP has higher requirements for hardware driver compatibility, and some older sound card drivers are often not supported. Although sometimes Windows XP may automatically install the sound card, it is often not possible to make the sound card sound in actual use. In this case, it is generally only expected that the manufacturer can provide compatible drivers.
(2) Insufficient volume is not enough - that is, the output power should not be reached. At this time, adjust the volume knob on the speaker or adjust the volume adjustment icon on the taskbar. The effect is not very obvious. This type of failure can be divided into four situations:
1 The input plug of the speaker is wrongly inserted in the Line Out jack:
This connection method will cause the sound signal to be directly transmitted to the power amplifier circuit of the speaker without being amplified by the sound card onboard amplifier, and the power required for the speaker power amplifier circuit is higher, resulting in a smaller output volume. In this case, simply change the input plug of the speaker to the SPK jack of the sound card, and the volume can be obviously improved.
2 The internal circuit of the speaker itself has a fault:
If the previous method is used, the volume cannot be significantly increased, and the internal power amplifier and power supply circuit of the speaker may be faulty. Since the maintenance requires the necessary electronic knowledge and hands-on skills, it is better for the general readers to perform maintenance by professional maintenance personnel.
3 The chip or circuit of the sound card is faulty:
If the speaker has been confirmed to have no problem, it may be a problem with the components of the sound card itself. Generally, only professionals are required to handle or replace the sound card.
4 sound card and motherboard compatibility issues:
This situation is rare but it does exist. If you suspect this, you can switch the sound card to another computer for testing. If the sound card volume is normal on other computers, there is a compatibility problem between the sound card and the motherboard. This problem can only be solved by replacing other brands and models of sound cards.
(3) Faults with large noise The faults with large noise mainly refer to the sounds in the sound of the sound when the computer is running the sound software, such as howling, “嗡嗡â€, “沙沙†Waiting for the sound. The ability to run audible software indicates that the system is working properly, and the problem is mainly in the sound card or speaker. Moreover, it is more common in the case that the speaker amplifier is self-excited or subject to external interference. We will discuss the inspection steps and processing methods of this noise fault.
1 Check the active speakers:
In the first step, disconnect the signal connection between the active speaker and the sound card, and turn on the power of the speaker, then turn up the volume knob. If there is noise, there is a problem with the speaker, which can be handled by professional maintenance personnel.
2 speakers have no problem but the noise is loud after connecting the sound card:
At this time, it should be checked whether the speaker input signal line is connected incorrectly, and the wiring error will also produce howling. Usually the connection between the sound card and the active speaker is a one-to-two stereo audio signal line, and two lotus plugs should be plugged into the two inputs of the active speaker. If one is connected to the input of the active speaker and the other is connected to the output of the active speaker, a howling sound is produced. On the other hand, if the required power of the speaker is small, and the two-channel plug is connected to the SPK jack of the sound card amplifier circuit output, there may be noise and distortion. In this case, the plug can be inserted into the sound card. Try the Line Out jack.
3 high and low frequency electromagnetic interference problems:
If it is determined that there is no problem with the software and hardware after inspection, it should be considered whether the high and low frequency electromagnetic interference caused by the internal and external circuits of the chassis interferes with the audio system. For example: poor power supply filtering, high and low frequency electromagnetic interference caused by graphics cards, motherboards and other cards. At this point, you can open the chassis and insert the sound card into the slot away from the card such as the graphics card, network card, and video card to reduce the noise caused by high-frequency interference.
Noise faults caused by poor power supply filtering will usually see moiré on the display. In this case, the power should be repaired or replaced immediately.
4 sound card circuit failure or sound card is not compatible with the motherboard:
If the noise is lost when the sound card is changed to other motherboards, it is a compatibility problem between the sound card and the motherboard. This must be replaced with other brands and models of sound cards. Otherwise, it is a problem with the sound card itself. You can ask the professional to do the repair.
Second, the integrated fault card integrated sound card In addition to the possibility of failure of the independent sound card, because it usually needs the support of the CPU to complete the audio decoding work, the hardware system has a great impact on its normal operation or not. . Therefore, there are some special fault phenomena in the integrated sound card. It can be roughly divided into three situations:
(1) The integrated sound card cannot be sounded normally due to overclocking:
In the soft sound card integrated in the motherboard, whether it is ALC650, 655, or VIA's audio decoder chip, it is extremely sensitive to the overclocking of the system. There are a lot of onboard soft sound cards that work without any problems at standard frequencies. However, in the overclocked state, the sound tears, the speed of sound becomes faster, and the sound is intermittent. In severe cases, the system may not even find a sound card, which causes the computer to be "dumb". Therefore, if you plan to overclock the computer, it is best to completely shield the onboard sound card, and then buy and install an independent sound card.
(2) Detection and elimination of integrated sound card "popping" fault:
This "popping" phenomenon is more serious when running the program. If the possibility of problems with the system software and the driver and the sound card hardware itself has been basically ruled out, the following steps can be made in steps:
1 Because of the low signal-to-noise ratio, it is one of the main reasons for this "popping" to be susceptible to electromagnetic interference. In order to eliminate this effect, try to avoid using the SPK jack of the sound card at the input of the speaker. Because it uses the built-in amplifier unit of the sound card, although the signal strength is greatly improved, the signal-to-noise ratio is much lower. Therefore, it is best to use the Line Out jack to pass a relatively pure signal directly to the speaker.
2 Because the processing of integrated sound card digital audio is completely dependent on the CPU. Therefore, if the CPU has to deal with other tasks while playing music, especially when the hard disk is frequently read and written, a large "pop" sound will appear. At this point, try to eliminate this effect by turning off the DMA option on the hard drive, but at the expense of hard drive performance.
3 Install the latest version of the motherboard patch and sound card driver.
Because there are many congenital insufficiencies in the integrated sound card, in order to completely eliminate this "popping" and obtain better sound quality, purchasing a better quality independent sound card is the most effective solution.
(3) Use Windows XP system at normal frequency, but there will be intermittent sound problems when running certain programs:
This situation can occur in many integrated soft sound cards. When encountering a more serious situation, we first need to check if the power of the power supply is sufficient. Then check if the transfer mode of the hard disk is DMA. Then, you can adjust the sound option "Full Acceleration" in the DirectX Diagnostic Tool to "Basic Acceleration".
If you have a newer version of the sound card driver, be sure to download the update in a timely manner. Through the above several steps, the "popping" phenomenon will generally be alleviated or eliminated.
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