The power of the computer squeaks and the computer cannot start

1.The most likely thing is that your computer fan is a problem, the computer fan does not rotate or there is a problem with the rotation, resulting in poor CPU heat dissipation, and the machine will be called; Generally, the computer will be used for a long time, or there will be a squeaky sound if there is too much dust in the case, a bit like a mouse barking. Take off the fan, deal with the dust, if there is lubricating oil, add some oil to the fan motor, if you don't add some oil for our own food, don't add more to get it everywhere.

2.There may also be problems with the power supply, but the probability is relatively small, and if there is a problem with the power supply, there are only 2 points; 1. The power supply is not powered. Second, the power of the power supply is insufficient.

You may be caused by insufficient power supply in this situation, see if there are other devices on your computer that you don't have, go down to reduce the amount of use, and some things such as optical drives can be disassembled first.

3.If it's ticking, it's your computer's memory.

Do you want to ask if it's squeaky or didi?

Squeak to see if the power supply is on the fan or something.

If it is Dididi, it may be a memory error, if the relevant hardware in the case can operate normally after booting, it means that the fan you see, the indicator light, etc., is the hard disk running?

Everything is working properly means that your power supply is fine.

As you mentioned, I'm sure it's unlikely that there is a problem with the power supply, and it should be that some other hardware is malfunctioning.

The power can't be turned on, the machine can't start, there are too many possibilities to list one by one.

To buy a power supply, it is recommended that the Great Wall or Huntkey have the price of cabbage, at most forty or fifty yuan. I'm afraid it will cost dozens of yuan to repair.

Your question is indeed unheard of, very strange, are you sure that the sound is coming from the power fan?

Look at what you said, please check the graphics card, graphics card cable, network card, etc., is it firm? Dirty, no, etc.

If you're not sure, try replacing yours with a friend's or a unit's normal power supply, and a 20-pin one will work.

Friends upstairs said very good, such as ilike Qian and other friends.

Okay, let's talk about how it is, okay?

One possibility is a supernatural phenomenon, the landlord, please evacuate in front of the computer, and the computer will be handed over to me for free destruction.

The second possibility is a problem with the relay.

The third possibility is the sound of a fan.

The fourth possibility is hallucinations.

You can change the power supply and try it, it doesn't cost much, it's better to repair one than to change it.

You'd better ask a professional to repair it, and it's better not to operate it yourself.

If you're not a professional)

For example, go to a place like a computer city or an electronics repair market.

Power issues. The method I am talking about, perhaps, is simple.

I hope it, otherwise the power supply is really not easy to repair, you can only change it, you take off the power supply, clear the soil, and install it.

If you have a problem with the fan, you can try replacing the fan.

As you say. Most likely, it's a hard drive issue. You try unplugging the hard drive and turning it on.

The transformer of the power supply is broken, and it has to be replaced.

I guess it's your graphics card problem, see if your graphics card isn't plugged in securely.

If you say so, it may be the power supply, but it may be the hard drive.

Take out the battery pack in the computer, and then use the power adapter to test the machine, if the fault still exists, it means that there is a problem with the power adapter; If the battery pack can be turned on normally, it means that the battery pack has aged and must be replaced with a new battery pack.

If you can't take out the battery pack and can't turn on properly, there is a worst-case scenario: there is a problem with the motherboard.

Disconnect the power adapter and replace the power adapter of the same model in normal use, if it can be turned on normally, it means that the power adapter is faulty.

Computers, or to update in time.

This may be the case with a malfunction in the computer's hardware. Typically, the computer will perform a self-test when it boots up, and if a hardware failure is detected, an alarm will sound. A squeak can be an alarm sound from your computer's motherboard or power supply, and the reasons why it may be muffled include:

Memory failure: Memory issues can be one of the most common reasons why your PC won't start. If the memory is bad, the computer won't boot properly and will squeak.

Hard drive failure: The computer also squeaks when the hard drive is broken or the data is unable to read the hail bend.

Faulty graphics card: If the graphics card is faulty or the socket is bad, the computer will also squeak when it boots up.

Power failure: When a power supply fails, the computer may not start properly and squeak.

If you don't know how to troubleshoot these issues, it is recommended that you seek professional technical support.

If your PC won't boot and it is issued"Squeak"or"Tick sound"and other sounds, it may indicate that there is a hardware problem with the computer. Here are some possible solutions:

1.Check Hardware Connections: First, check all hardware connections. There may be some hardware components (such as memory modules, graphics cards, hard drives, etc.) that are loose or incorrectly inserted, causing the computer to fail to boot properly.

2.Check the memory module: Unplug the memory module and plug it back into your computer.

Or try to insert one memory stick by one to see which one of the memory sticks may be causing the problem. If you can, you can also try replacing some other memory sticks to check if one or more of them are corrupted.

3.Check the hard drive: Consider checking whether the hard drive is damaged, and you can check whether the hard drive (such as SSD, HDD, etc.) has been exhausted by its full life. You can try using your computer's diagnostic tools to make sure the drive works well.

If none of the above methods work, it is recommended to contact professional computer technical support for repair or further evaluation.

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 the inductive circuit of the brigade, which causes instantaneous spikes, or by the brush mechanism of the motor in contact with the commutator piece. These distortions in the power supply can cause computer gear accidents or computer errors.

In order to avoid this situation, mainframe computer 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.

There is a leakage of the power supply, the power can not meet the requirements of the computer, you can continue to use, but after a long time may not be able to use, this thing is not worth repairing, it is not expensive to change one, less than 200 yuan to change a very good.

If the computer makes a noise as soon as the power supply is added, it may be due to the friction of the power supply fan caused by dust accumulation in the case; If it is due to the sound of the computer's read/write disk, it may be caused by the read/write head rubbing against the disk; In addition, you can disassemble the side cover of the case, power on the computer, and use a pen to test whether the chassis has leakage, and detect whether the power supply has a discharge phenomenon caused by insulation damage.

The high-frequency transformer coil of this power supply is loose, this is the high-frequency noise of the high-frequency transformer, it is recommended to replace the power supply as soon as possible, this power supply even has a sound when clicking the mouse, that is, there is no photoelectric isolation, and it will be very troublesome if you don't change it.

The solution is to remove the metal mesh on the fan side of the power supply, remove the fan, there is a label in the middle, carefully tear the label, you will see a small hole, which is for oil injection, there is a dustproof rubber plug filled on it, uncover the rubber stopper, dip a small amount of oil with a syringe, drop it into it, and pay attention to seal it with a rubber plug to prevent oil leakage.

One of the squeaky sounds may be the hard disk, the mechanical hard disk has been used for a long time, the hinge is worn, and there will be a squeak when running at high speed. The other is the fan, the fan may not be installed, and there may be contact with the surrounding wiring or other reasons, and it may also make this sound.

It is recommended that you first confirm that it is the sound of **, and disassemble the chassis to see. If it's a hard drive, you can't get it, so wait for the hard drive to break down and replace it with a new one.

Newly bought power supply, to the seller for repair or replacement.

There are three situations in which a squeak is made:

1. The inductance coil and transformer in the power supply will not affect the use due to the inductance noise caused by poor impregnation or poor design, and there is no good way to solve it except for replacement.

2. The inferior capacitor in the power supply, or the pulp capacitor will squeak after being energized, and replace the problematic capacitor.

3. The power supply fan will sometimes squeak, dust and oil.

You have to be able to tell if it's mechanical, electromagnetic, or current. According to your description, the sound changes due to the load, it is likely to be a mechanical sound, that is, the sound made by the shaft of the power supply fan, you can turn it on to clean up the dust inside the power supply, add some grease to the shaft, or you can change the power supply fan, which is 12V. If you are unfortunate enough to encounter electromagnetic sound, then you should pay attention to the fact that the so-called "death howling" is easy to emit the main transformer and FET, which is due to the change of electrical distribution parameters, resulting in the imbalance of the power control chip.

In this case, you can't solve the problem by being scared all the time.

This "sizzle" 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 generated, it indicates that the power supply is aging, if it can be used normally, you can leave it alone, if you can't use it normally or can't tolerate the noise, you can replace the power supply.

3 Just popularization: When the inductor is working in DC, there is always 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.

4. Inductance acoustic noise of DC-DC circuit 1) Excessive load current 2) Overvoltage protection Solution: Reduce the load current or replace the DC-DC with slightly larger power. To fundamentally solve the instability of the duty cycle, the small signal of the control loop is generally disturbed by noise, and the duty cycle of the DC DC needs to be adjusted to be very stable.

It may also be caused by the hysteresis stretching of the core, which can be impregnated with the inductor.