What is the reason for the current sound after the computer is connected to the power supply?

The ones that will make a sound in the host are:

1. CPU fan.

2. Power supply fan.

3. Graphics card fan.

4. Hard disk fan.

5. Chassis fan.

6. Optical drive. 7. Hard disk.

Generally, the sound comes from the fan.

Remove the fan to clean up the dust on each fan, and then put a little oil (lubricating oil) in the middle of the fan, and just install it back!

If there is still a sound, then I have to check them one by one!

Disconnect the fans one by one to see if there is still a sound, and find the faulty fan to replace!

When the computer is reading and writing operations, the hard disk will send out a "rattle". The ringing sound.

According to the failure analysis, the hard drive emits a "quack. The noise is generally caused by the physical bad sectors of the hard disk. You can back up the important data in the hard disk first, and then format the hard disk at a low level, so that the hard disk can be used for a while.

Check whether the wiring and plug of the speaker are securely plugged in.

Whether this current sound is emitted by the motherboard box or the speaker is not clear. The speaker is emitted, unplug the speaker signal cable, and listen to it still ring?

Ringing, it's a speaker problem. It's not the noise that has to do with the computer.

First check whether the speaker plug has poor contact, turn the plug of the signal cable by hand, and let it rub off the oxide layer with the jack to try.

If it is determined that the sound is coming from the power supply, then there is a problem with the power supply. There are two possible scenarios:

The first type: If the capacitor of the power supply bursts, it will discharge, which will produce a sizzling sound, resulting in an unstable power supply and unclean filtering, and the final result is that the computer cannot be used.

The solution is to disassemble the power supply, observe the capacitor, and see which one has a strong surface or uneven surface, and it needs to be replaced.

Second, there is a problem with the fan, which causes the power supply to dissipate insufficient heat and the temperature is too high, and it will automatically shut down. The test method is to feel the surface problem of the power supply with the back of your hand and observe the fan.

Obviously, it is abnormal, if the power supply is still a little electric sound after the computer is shut down, it means that this power supply has been aged, and it is best to replace it if there is a problem.

After the computer is turned off, there is still a little current sound in the power supply, which is abnormal, and the power supply should also be powered off, but at least there should be no self-made current sound. This is a flaw in the chassis circuit design.

After the computer is turned off, the power supply is still a little current, which is normal, because there is still a certain amount of power in its electrical appliances, so it will be released when it is shut down, and it will soon be gone.

If the computer is shut down, it is normal for the power supply to have a little current sound, because after the computer is turned off, the CPU and fans of the power supply are running there.

This is caused by the capacitance in the power supply, generally a good capacitor should not be like this, but it is not excluded that the residual power of the capacitor continues to discharge so that the inductor makes a sound, it is recommended that the subject unplug the power cord after shutting down, so that the equipment can be better protected from fire hazards, because the shutdown of the computer actually still has a small part of the circuit continuing to work, only by disconnecting the power cord can the power supply be disconnected!

Do you hear the sound of communication from? You heard it from the stereo, right? That's the reason for the audio, and it has nothing to do with the computer! If you do hear AC from your computer's power supply, then the problem is more serious and needs to be repaired!

It's not normal, you're all turned off, even if it's the standby current of the power supply, there must be no sound.

If it is determined that the sound is coming from the power supply, then there is a problem with the power supply. It is possible that the capacitance of the power supply has blown off and it will discharge.

It's not normal, the standby current is very small after the computer is turned off, and the sound is not normal.

Generally, after the computer is turned off, the power supply is still working. Basically, you can't hear anything. So if you can hear the current, you can basically determine that there is a problem with the power supply.

After the computer is turned off, the sound of a little current in the power supply is abnormal, and there is no sound after the shutdown.

First use sandpaper to polish the power pole, and then change the power cord and socket bar to try again, sometimes the contact is not good, and there is a current sound.

The reasons why the computer has an electric current sound and the solutions are as follows:

1. The problem of power socket is that the static electricity cannot be eliminated due to the power socket not being connected, resulting in current sound.

Specific solution: First of all, it is recommended to unplug the external power supply to determine whether there is a power socket problem. If it is a socket problem, it is recommended to replace the socket and contact a professional to check the socket wiring as soon as possible.

2. The sound of the turntable of the mechanical hard disk or the sound of the CPU running at full load.

Specific solution: Reboot the computer and check the CPU.

There are three points to the sound of electric current generated by the computer:

1. The jack does not fit, it is recommended to replug and unplug.

2. Hardware problems. The sound card on the motherboard is broken and needs to be repaired.

3. If there is a problem with the software settings, it is recommended that you re-enter the sound settings.

According to your description, the second possibility is more likely, and the landlord will take it for repair.

If you want to reinstall the sound driver, check whether the audio interface is loose or if the problem is not good.

Updating your audio driver with the driver wizard may solve the problem!

There is a problem with your original speaker, which damages the sound card output port of the computer, making the sound problematic. It may also be that there is a problem with the sound card driver, or the system, you can rule out the software problem first, and you can only add another sound card.

Check the front and rear headphone jacks for poor contact and if you've plugged in the wrong hole.

See if the headset is in bad contact with the computer!

Computer current tone problem solved.

There are several reasons for the current tone of the computer:

First, it is caused by electrostatic induction. 62616964757a686964616fe78988e69d8331333433623061

The reasons why the power amplifier has current sound energy when it is energized are:

1) Poor electromagnetic shielding at the input level.

2) The filter capacitor capacity is insufficient, and the full-wave rectification becomes half-wave rectification.

3) There is a strong source of electromagnetic interference near the machine, which causes too much ripple in the DC power supply.

4) The input stage lead is open, and the interference is channeled in.

5) There is a problem with the rectifier circuit.

There are many reasons for the current sound of the speaker, such as the speaker is disturbed, the interface or connection line is not in good contact, the speaker itself is of poor quality, and so on. Generally speaking, the speaker is mostly an active speaker, and there must be an amplifier inside, so noise is inevitable, and the noise of the active speaker can be roughly divided into electromagnetic interference, mechanical noise and thermal noise. Speaker issues lead to:

1) Electromagnetic interference: Electromagnetic interference can be mainly divided into power transformer interference and stray electromagnetic wave interference.

i) Power transformer interference:

Due to the magnetic leakage caused by the power supply of the multi-** speaker, the effect of installing a shielding cover for the transformer is very obvious when conditions permit, which can block the magnetic leakage to the greatest extent, and the shielding cover can only be made of iron materials. We should try to choose products with big brands and solid materials, and in addition, using external transformers is also a good solution.

ii) Stray electromagnetic interference:

More commonly, speaker wires, crossovers, wireless devices, or computer hosts can be the source of interference. Keep the main speaker as far away from the computer as possible and reduce the number of peripheral wireless devices.

2) Mechanical Noise:

Mechanical noise is specific to active loudspeakers. During the operation of the power transformer, the core vibration caused by the alternating magnetic field will produce a mechanical noise, which is very similar to the humming sound emitted by the ballast of a fluorescent lamp. Choosing the best product is still the best way to prevent this noise.

In addition, we can add a rubber shock absorber between the transformer and the fixing plate.

3) Thermal Noise:

This is generally caused by poor contact with the signal ground, which is not connected or has poor contact, which will introduce interference noise, such as current sound. After the amplifier in the speaker is amplified, the current sound will be louder.

The cause is that there is a problem with the audio signal cable connecting the speaker and the computer, and a problem with the contact plug can also cause the sound of electric current.

The common connection signal cable is caused by poor grounding of the audio plug of the computer or the double lotus plug of the audio.

As shown in the figure below: Solution: Replace the signal cable, or clean the plug of the signal cable to solve the problem.