The computer host always has the sound of electric sparks, and the smell of mush, what s going on?

It should be the circuit board burned out! Computer power supply and graphics card is very power-consuming, especially the power supply, all the current must be provided through the power supply, some users do not unplug the power plug, the power supply will be in standby mode for a long time, the higher the voltage at night, the easier it is to damage. It is estimated that the computer motherboard has not been cleaned for a long time and has accumulated too much dust.

It is estimated that small animals have entered the power supply of the case, or there is too much dust causing a short circuit and sparks.

If you smell burnt when using the computer, but the computer can still be used normally. At this time, it is important to be aware of this phenomenon in time, because if it is not dealt with in time, it is likely to cause a fire or cause damage to the computer. The computer may be hot.

There are three places where the burnt smell appears.

One is a computer plug-in board. One is a computer monitor. The main one is the computer case.

Power supply, graphics card, CPU fan you see if it still spins, touch whether there is a very hot place, if the heat dissipation is not good, the temperature is too high, the wire will smell burnt, you have to pay attention, be careful to burn out the hardware.

In this case, it is recommended that you check the computer first, there is a mushy smell, indicating that something must be burned, although the computer can still be used, but, also be careful, in case of a disaster, it is troublesome, it is best to check it quickly, to see if the connection line is not connected well, or the voltage and current are too high, there is a mushy smell, or be careful as well.

When you hear the sound of electric sparks and smell the mush, you should immediately shut down and cut off the power supply, and then check that the ** is virtually connected, which can generally be seen with the naked eye.

Power failure, it is estimated that the internal varistor protection resistance of the power supply is blown up, if it is not the problem of high power supply voltage is the change of the characteristics of this varistor, broken, this broken and burned off the insurance, generally replace these two originals, there is also an electrolytic capacitor fried, but there will generally be white mist generated, generally there will be no electric spark, what is the specific disassembly to see, pay attention to safety!!

It should be a failure of the computer host, check whether the internal parts are damaged, there may be a broken cooling system, or the motherboard may be damaged.

You should have a problem with the power supply, you had better check the quality of the power supply, don't use it, if the power supply is wrong, it is easy to damage other parts of the computer.

If the motherboard line or power supply line is in poor contact, it is better to replace it in time if there is a mushy smell.

There may be a leakage or short circuit in the line, so hurry up and check it.

The power supply is faulty or the motherboard wiring is in poor contact.

It is not recommended to use it, at this time, thoroughly check the inside of the computer host, pay attention to whether the fan can operate normally, and initially suspect that it is caused by poor heat dissipation.

It should be repaired as soon as possible if the host fails.

If you want to check this carefully, it feels like the line is seriously aging.

It needs to be disassembled and checked well, otherwise it will be a big trouble in case of a short circuit and fire.

This is still looking for a repair computer to test it.,Otherwise, the hardware may be burned out.,That's how my previous motherboard was finished.,Computer hardware can look at Master Lu's test data to understand.。

It may be a power supply problem, it is recommended to change to a new power supply.

See if there's a place where there's electricity.

It's a good idea to open the case to see which accessory is having problems.

This "zizi" sound may come from the following places:

1. The inductance of the power supply is emitted.

2. The fan of the power supply is emitted.

No matter where it is sent, it indicates that the power supply is aging, if it can be used normally, you can leave it alone, if it can not be used normally or can not tolerate this noise, you can replace the power supply.

When the inductor is operating in DC, there is a switching current of about 1MHz at both ends of the inductor coil. And the change of this current will cause the inductance coil to vibrate, emitting a sound of about 1MHz, but people can't hear such a high-frequency sound.

If the ear can hear the howling, it is certain that there is a switching current of about 20Hz-20kHz at both ends of the inductor. This is due to frequency instability.

If the system temperature is high, it is easy to cause the computer to run unstable, and in serious cases, it will also cause crash or restart, and even damage the hardware device. Poor fan heat dissipation is usually caused by increased dust or lack of lubricating oil. The cooling fan will not only hinder the heat dissipation of the heat sink, but also affect the rotation of the fan, so the fan should be cleaned after a period of use.

There should be two possibilities for this "zizi" sound:

1. The sound emitted by the inductance of the power supply.

2. The fan of the power supply, whether it is sent out, is prompting the aging of the power supply, if it can be used normally, you can ignore it, if you can't withstand the normal use of the hidden ruler or can't stand the noise, you can replace the power supply.

When the inductor is operating in DC, there is always a switching current of 1MHz at both ends of the inductor coil. And the change of this current will cause the inductance coil to vibrate, emitting a 1MHz sound, but people can't hear such a high-frequency sound. If the ear can hear the howling, it is certain that there will be a switching current of about 20Hz to 20kHz at both ends of the inductor.

This is due to the fact that the frequency is unstable and the luggage is carried out.

1) The current of the load is too large.

2) Overvoltage protection.

Solution: Reduce the current of the load or replace the DC-DC with slightly higher power. So as to fundamentally solve the instability of duty cycle.

Generally, the small signal of the control loop is disturbed by noise, and the duty cycle of DC DC needs to be adjusted to be very stable. It is also possible that the hysteresis of the core is caused by the expansion and contraction, and the inductance can be impregnated.

This may be a failure of any component in the inner coarse part of the computer power supply, or a short circuit circuit in the internal circuit board of the computer power supply, or an aging phenomenon in the internal capacitors of the computer power supply.

The step-down circuit in the power supply will have a relatively large current, and the large current flowing through the conductor will cause the conductor molecules to collide, which is the commonly heard current sound.

Generally, the computer power supply will have a fan, the sound of the fan is much louder than the sound of the current, if the current sound is louder than the sound of the fan, it means that the power supply will be damaged, it is recommended to replace it.

Is there anything wrong with the current sound of the computer power supply?

Hello, friend, I'm glad to answer for you, the computer power supply will produce a slight electric current sound. The step-down circuit in the power supply will have a relatively large current, and the large current flowing through the conductor will cause the conductor molecules to collide, which is the commonly heard current sound. Generally, the computer power supply will have a fan, the sound of the fan is much louder than the sound of the current, if the current sound is louder than the sound of the fan, it means that the power supply will be damaged, it is recommended to replace it.

If the current sound is not turned on, but the current sound can only be heard if it is close.

And it's also a newly bought power supply.

I asked the customer service about this, and he said a lot.

It's normal to say this, but I think it's still a bit of a grudge.

Your situation is indeed normal, not a problem, for example, sometimes the refrigerator at home can also be heard, because the electronics will have wiring, normal, rest assured to use.

Okay, thank you.

This "sizzle" sound: the inductance of the power supply is emitted, and the fan of the power supply is emitted.

In the PC system, the backup UPS occupies a considerable proportion, when the power grid suddenly fails, the backup UPS will switch the power supply, but this generally takes 2 10ms switching time (depending on the specific performance of the UPS), so during this period, the power supply itself needs to be able to maintain a short power supply by the power stored in the energy storage element, and the holding time of the general high-quality power supply can reach 12 18ms to ensure the normal power supply during the UPS switching.

Mainframe Power Supply:

Mainframe computers are sensitive to power distortion or interference called "noise." Noise is mainly caused by disconnecting an inductive circuit that causes a transient spike, or by the brush mechanism of the motor coming into contact with the commutator piece. These distortions in the power supply can cause computer accidents or cause computer errors.

To avoid this, mainframe networks need a "high-quality" power supply. A computer can be powered by a ring or radial circuit, and the power supply can be as close as possible to the power supply line that supplies power to the building. Reliable grounding can also be obtained from this one.

It is usually a core in the cable, not a shield of the SWA cable, and is distributed around the terminal wiring circuit.

The above content reference: Encyclopedia - Computer Power Supply.