There was a small noise coming from the computer case. Under the guidance of Wangda people.

There are several possibilities for this kind of sound, the AC sound of the transformer in the power supply, the mechanical friction sound in the hard disk, the fan noise, etc., open the case, listen carefully, and check them one by one.

1. The fan has been used for a long time, the lubricating oil in the fan is solidified, there is a lot of dust on the fan page, the fan is difficult to run, and the temperature comes up after a period of noise operation, and there is no sound or the sound becomes smaller. Open the case, find out which fan (power supply, CPU, graphics card) is the problem, turn off the power supply, remove the fan (be careful not to remove the heat sink, if you remove it, apply silicone grease glue when you put it on again), remove dust, uncover the plastic oil seal, on the roller, put a little antifreeze lubricating oil or sewing machine oil, seal it, and then put it on as it is; If the fan is badly worn or broken, replace it with a new one.

2. CPU heatsink design problem, fan airflow produces noise, replace the heatsink.

3. Listen to whether the sound of the hard disk is abnormal, the hard disk is damaged and aging, or the overload operation will produce noise, yes, repair the hard disk.

4. Check whether the transformer in the power supply is aged or burned.

5. Whether the chassis and motherboard are loose, tighten the screws.

6. Sort out all the cables in the chassis and plug them in tightly.

7. Cover the case, listen again, what else is loud, press the case with your hand, if it doesn't sound, it is your case that is too thin or deformed.

8. Listen again, what else is loud, and rule out the symptoms.

Chassis resonance to see if it's caused by a power supply fan or CPU fan.

In addition, the buzzer that comes with the motherboard may also have this sound.

That's the problem of the fan, if there is dust in the case and the air is humid, it is easy to make abnormal noises. In this possible the shaft of your fan that piece is not lubricated.

It's really the sound of a hard drive reading.

Check if it is a sound card problem, you can use headphones to plug in the sound card to listen to whether there is any noise, if there is, it is a sound card problem.

Computer speaker noise, for the following reasons:

1. Check first to see if some of the surrounding external environment is good and whether the wiring is in good condition.

2. Check whether there is a problem with the sound card driver of the computer, and you can reinstall it again.

3. Whether to plug the speaker into the computer before turning on the computer, because the current when turning on the computer is large, it is easy to affect the diaphragm of the speaker, so it is best to connect to the computer after turning on the computer.

4. Adjust the volume control on the computer. Turn the microphone to 80 to 90 percent of the mixing volume.

5. See if there are inappropriate programs installed in the computer, and see if the host accessories of the computer are loose.

6. If there is a problem with the quality of the speaker, contact the after-sales maintenance audio.

There may be a source of interference next to it, or there may be static electricity, try to degauss due to the bottom line.

Pat the impact with your hands、、Guaranteed to be OK! Hehe.

There is a problem with the sound card.

Such as: filter capacitor open circuit and other faults.

1. Something inside the case has touched the cooling fan.

2. The vibration sound generated by the mechanical part of the hard disk and optical drive.

3. The vibration sound caused by the rotation of the cooling fan of the chassis, power supply, CPU, graphics card and other accessories.

1. Rearrange the wires in the chassis, and wrap the cords that don't work with cable ties.

2. Noise reduction and dust removal for graphics cards and CPUs: Strengthen the heat dissipation capacity of the heat sink, remove the hardened or deteriorated silicone grease in contact with the processor, graphics card and heat sink, and evenly coat the new silicone grease or gray silicone grease. Replace the radiator.

3. Tighten the screws of the hard disk bit and the solid bit, tighten each part in the host, replace the bad things, or install sound-absorbing cotton when there is noise, do not block the heat dissipation outlet.

Clean up the dust, change the silent version of the CPU fan, and pad the soft cotton under the chassis.

This is the sound of the hard disk, it's okay, because the running speed of the hard disk is constantly changing at the beginning, and when the boot is normal, there is no sound when his running speed is stable, which is a normal phenomenon.

The dust on the fan is too thick, so dismantle the chassis case when the power is off, remove the card key with the fan, remove the ash, reassemble and turn on the machine, not only does there be no noise, but it also runs faster.

Check if it's a power box, clean the case dust, and carefully see if it's loose.