Common computer host faults and how to deal with them?

Computer host failures occur frequently, affecting work and entertainment experience? PHP editor Apple has compiled a guide to common faults and solutions for the majority of users to help you solve the problem quickly. From blue screen of death, black screen and no display to loose memory modules, graphics card overheating, etc., the following content will explain in detail the causes and countermeasures of each failure. Read it quickly, stay away from troubles and enjoy a smooth usage experience!

1. Common computer host faults and how to deal with them?

First, the problem of leakage. We often get electric shock when touching the host. This is because during the power supply process, some components form a path with the chassis, causing leakage. A common solution is to first check whether there is a quality problem with the power supply. If there is a problem, quickly replace the power supply with a new one. Secondly, if it is not a quality problem, you can connect a ground wire to complete the discharge work.

Second, there is a serious smell inside the case. Don't take it lightly, be sure to carefully check each component in the chassis. If there is any burnt phenomenon, it is mostly caused by a power supply problem, because too high or too low voltage will cause the components to burn. Use a multimeter to measure the power supply pins. If there is a problem with the power supply voltage, replace it in time.

Third, it cannot be turned on normally. After booting, only the CPU fan runs. And it often crashes, and the software part has been checked and there is no problem. At this time, it is necessary to check whether there is a problem with the power supply. Similarly, use a multimeter to check whether the voltage and other parameters of its pins are up to standard. If there is a problem, it is best to replace it in time to avoid secondary damage to other components.

Fourthly, pressing the power button will not shut down the device, but selecting the shutdown button in the menu will shut down the device. This is a CMOS setting problem. Just enter the CMOS and select the BIOS option to set it.

Fifth, there is sparking behind the power supply of the host computer. During this period of time, this problem always occurred in our computer room, and after inspection, there was no problem with the power supply. Later, after inspection, it turned out to be a problem with the power cord. The quality of the power cord sometimes directly affects the host power supply. The only solution is to buy new ones, and the price is about 10 yuan a piece.

Sixth, start the fire in the host. It is generally difficult for other components in the host to spark. Most of the reasons occur in the power supply, which is caused by short circuits in the internal components of the power supply. The solution is to send it to a repair shop or replace it with a new one.

Seventh, the fan inside the chassis rotates too loudly. Turn on the host and check. There is basically no sound from the CPU fan and graphics card fan. The sound is undoubtedly coming from the power supply. The solution is to disassemble the power supply and clean the dust on the power supply fan. This problem can basically be solved.

2. What are the common troubleshooting methods for computer keyboards?

1. It’s all the fault of foodies

In the hands of foodies, the keyboard often becomes a collection place for food residues. Some larger food residues, such as melon seed shells, and some sticky objects may fall into the gaps between the keyboards. As a result, the keyboard gets stuck after being pressed and cannot rebound normally. The keys need to be pulled out to reset.

Solution:

This kind of stuck key is also very simple to deal with. After pulling off the keycap and cleaning up the debris at the bottom of the keyboard, the problem can be solved.

2. Unavoidable aging

For mechanical keyboards, aging keys are mainly caused by two reasons. One is that the springs inside the mechanical keyboard are corroded, which leads to a reduction in elasticity. This is true in the south, especially in areas with high air humidity. is a frequently encountered problem. After three to five years of use, mechanical keyboards are prone to key jams caused by spring corrosion.

Secondly, there is the problem of friction and aging between the keyboard cover and the axis core. During the use of a mechanical keyboard, there will be wear and aging between the key cover and the axis core. When the wear and tear reaches a certain level, the friction will increase. In this way, the spring cannot pop out the shaft core smoothly, causing the key to jam.

Solution:

If the above-mentioned aging key jamming problem only exists in a few keys, you can solve it by replacing the spring, adding lubricant to the shaft core, or even replacing the keys.

3. Liquid corrosion is the culprit

The keyboard only reacts occasionally when you tap the keyboard continuously, and this phenomenon tends to become more and more serious. In the early stage, the keys occasionally fail, and in the later stage, the keys only occasionally work or even fail completely. .

When mechanical keyboards have this problem, it is most likely caused by water intrusion: in terms of waterproofing, mechanical keyboards are inherently weak. The keys are not sealed. It is difficult for mid-to-low-end products to have waterproof structures. In this case, a glass of water may kill them. keyboard, and cola, coffee, and juice containing sugar and phosphates are even more powerful.

Solution:

For buttons that are not too severely corroded, you only need to spray a rust-removing lubricant like Philips Water into the disassembled buttons to solve the problem. If the rust is severe, the key body needs to be replaced.

4. Welding and desoldering: common problems of low-cost mechanical keyboards

The workmanship of some low-priced mechanical keyboards today is not outstanding. Not only do they use unknown domestically produced shafts, but they also have no underlying iron plate, the circuit board is relatively thin, and even the welding process is not up to standard.

Solution:

Such a problem is not difficult to solve. Just carefully observe the solder joints under the unresponsive button to see if there is desoldering and perform repair welding. If the copper foil of the circuit board is cracked , which is more troublesome to observe.

However, in this case, most of the problems occur when several keys are unresponsive at the same time. As long as you find the common copper foil of these keys and use a multimeter, you can quickly find the breaking point of the copper foil, and then use a Simply connect the solder joints with a jumper to solve the problem.

3. What are the common valve failures and their solutions?

1. Valve body leakage:

Cause:

1. The valve body has blisters or cracks;

2. The valve body is cracked during repair welding

Treatment:

1. Polish the suspected cracks, Use 4% nitric acid solution to etch and reveal any cracks;

2. Excavate and repair the cracks.

2. The valve stem and its matching nut thread are damaged or the valve stem head is broken or the valve stem is bent:

Reasons:

1. Improper operation, excessive force on the switch, failure of the limit device, and failure of the over-torque protection . ;

2. The thread fit is too loose or too tight;

3. Too many operations and the service life is too long

Treatment:

1. Improve the operation and do not use too much force; check the limit device and check the excessive torque Protection device;

2. Choose appropriate materials and assembly tolerances meet the requirements;

3. Replace spare parts

3. Leakage on the valve cover joint surface: Reason:

1. The bolt tightening force is not enough or the tightening force is biased;

2. The gasket does not meet the requirements or the gasket is damaged;

3. The joint surface is defective

Treatment:

1. Retighten the bolts or make the door cover flange gap consistent;

2. Replace the gasket;

3. Disassemble and repair the sealing surface of the door cover

4. Internal leakage of the valve:

Reasons:

1. Loose closing;

2. Damage to the joint surface;

3. The gap between the valve core and the valve stem is too large, causing the valve to The core is sagging or has poor contact;

4. The sealing material is poor or the valve core is stuck.

Treatment:

1. Improve the operation, reopen or close;

2. Disassemble the valve, and re-grind the sealing surface of the valve core and valve seat;

3. Adjust the gap between the valve core and the valve stem or replace the valve disc;

4. Disassemble the valve to eliminate jamming;

5. Replace or overlay the sealing ring

5. The valve core and valve stem are separated, causing switch failure:

Reason:

1. Improper repair;

2 . The joint between the valve core and the valve stem is corroded;

3. The switch is applied with excessive force, causing damage to the joint between the valve core and the valve stem;

4. The valve core backstop gasket is loose and the connection part is worn

Treatment :

1. Pay attention to inspections during maintenance;

2. Replace the door rod with corrosion-resistant material;

3. Do not open or close the valve forcefully, or continue to open the valve after fully opening it;

4. Check and replace damaged spare parts

6. Cracks in the valve core and valve seat:

Reasons:

1. Poor quality of surfacing on the joint surface;

2. Large temperature difference on both sides of the valve Treatment:

Repair welding of the cracked area according to regulations Heat treated, polished and ground.

7. The valve stem does not lift or switch properly:

Reasons:

1. It is closed too tightly when it is cold and swells when heated or too tight after it is fully opened;

2. The packing is pressed too tightly;

3. The valve stem gap is too small and swells to death;

4. The valve stem and the nut are too tight, or the mating thread is damaged;

5. The packing gland is biased;

6. The door stem is bent;

7. The medium temperature is too high, the lubrication is poor, and the valve stem is severely rusted.

Treatment:

1. After heating the valve body, slowly try to open it or open it fully and tighten it and then close it slightly;

2. Slightly loosen the packing. Test open after gland;

3. Increase the valve stem gap appropriately;

4. Replace the valve stem and nut;

5. Readjust the packing gland bolts;

6. Straighten the door stem or replace it ;

7. The door pole uses pure graphite powder as lubricant

8. Packing leakage:

Reason:

1. The packing material is wrong;

2. The packing gland is not pressed tightly or is biased;

3 .The method of adding packing is wrong;

4. Damage to the valve stem surface

Treatment:

1. Select the packing correctly;

2. Check and adjust the packing gland to prevent pressure deviation;

3. Press the correct button Method: Add packing;

4. Repair or replace the valve stem

Article reference: Eight common valve faults and solutions - China Valve Enterprise Style Platform

4. Common faults and solutions of computerized pipe cutting machines?

1. The alarm cannot be started at startup: Different stops of the upper cutter will cause the power distance to hit, resulting in an overload alarm. At this time, you need to turn off the power and adjust the screws of the cutter slide, and then restart the equipment.

2. Common alarm faults: Intermittent beeping will occur when the batch is paused. When the batch pause time passes, the buzzer will automatically stop beeping.

3. The length of the cut tubes is inconsistent: the pressing wheel is not adjusted properly. Materials with high elasticity should have low pressure, and materials with low elasticity should have high pressure.

4. The material cannot be fed out: the slide is too loose and the upper knife stops at a too low position, which blocks the material feeding.

5. How to deal with garbled characters in ppt on Apple computer?

Garbled characters on Apple computers may be due to font incompatibility or encoding issues. The solution is as follows:

1. Try changing the font and choose a font that is compatible with the document.

2. Check the encoding format of the document to ensure it is consistent with the system settings.

3. Update operating systems and applications to ensure compatibility with the latest versions.

4. Try saving the document as another format, such as PDF or plain text, and then reopen it.

5. If the problem persists, you can try to use third-party software or online conversion tools to deal with garbled characters. If none of the above methods work, it is recommended to contact Apple’s official technical support or professionals for help.

6. What should I do if the ppt animation cannot be played on other computers?

On the changed computer, download the same office software or WPS software that is used for PPT on the original computer, so that its compatibility can run normally, and the call can be played normally.

Second, you can download the flash plug-in for animation playback in PPT. After installing the flash plug-in normally, restart the computer and play again, and the PPT can run normally.

7. How to display the English version of ppt on the computer?

Need to change the system language settings and program language settings to solve the problem. There is a clear need to change system and program language settings. Because PPT is displayed according to the system and program language, if the system and program language do not match, the English version will appear. The specific solution is to open the computer's "Control Panel", select "Region and Language Options", and set the language to Chinese. Then select "Options" - "Language" in the PPT and set the language to Chinese. In this way, the Chinese version of PPT can be displayed smoothly.

8. Guide to common computer troubleshooting: What to do if you encounter problems?

Common Computer Troubleshooting Guide

Nowadays, computers have become a necessity for our daily work and life. However, it is inevitable to encounter various problems during use. Sometimes there are network connection problems, and sometimes the software is running abnormally, which can cause endless headaches. However, how should we deal with these problems? Next, we will give some practical guides on how to deal with common computer failures.

Network connection problem

When using a computer, you often encounter abnormal network connections. At this time, you first need to check the connection status of the router and computer, confirm whether the network cable is plugged in, and whether there is any disconnection. Next, you can try restarting the router and computer, or resetting the network connection. If the problem still cannot be solved, you can contact the network service provider or professional technicians for help.

Abnormal software operation

In addition, abnormal software operation is also one of the common computer problems. In this case, we can try to restart the software or restart the computer, which sometimes solves the problem. If the problem persists, you can try uninstalling and reinstalling the software, or look for solutions on the official website. In addition, regularly updating systems and software can also help reduce the occurrence of such problems.

Hardware failure

In addition to software problems, computer hardware failures are also common. For example, if a computer has a blue screen or freezes, it is often caused by hardware failure. At this time, it is recommended to back up important data in time, and then contact professional maintenance personnel for inspection and repair to avoid further damage.

In general, computers will inevitably encounter various problems during use, but most of them can be solved through simple operations or some skills. For some more serious failures, it is recommended to seek professional help in time. I hope this guide to common computer troubleshooting can help you and effectively solve your computer problems.

Thank you for reading this article, I hope this guide can help you better deal with computer problems.

9. Common troubleshooting of kitchen appliances

Today we will talk about common troubleshooting of kitchen appliances. The kitchen is the most commonly used place in the home, so kitchen appliances are also indispensable tools in our daily lives. However, kitchen appliances can also suffer from various failures due to long-term use or improper operation. Understanding these common faults and how to deal with them can help us better maintain and use kitchen appliances.

Induction cooker won’t start

Some people may encounter the problem that the induction cooker won’t start. First, we need to check that the power cord is plugged in and that the socket is working properly. Secondly, there may also be some stains or oil stains on the surface of the induction cooker, causing it to fail to start normally. At this time, we can use a damp cloth to clean the surface and make sure the stove surface is clean. If the problem persists, it may be that the internal parts of the induction cooker are faulty. It is recommended to contact the manufacturer or professional maintenance personnel for repair.

냉장고 냉각 효과가 좋지 않습니다

냉장고 냉각 효과가 좋지 않은 것은 매우 흔한 문제이며 일반적으로 다음과 같은 이유로 발생합니다. 먼저, 냉장고의 온도 설정이 올바른지, 적절한 냉각 온도로 맞춰져 있는지 확인해야 합니다. 둘째, 냉장고 뒤의 라디에이터에 먼지나 이물질이 쌓여 열이 발산되는 것을 방해하고 냉각 효과에 영향을 줄 수 있습니다. 이때 진공청소기나 브러시를 사용하여 라디에이터 표면을 청소할 수 있습니다. 또한, 냉장고 문이 잘 밀봉되었는지 여부도 냉각 효과에 영향을 미칩니다. 문 밀봉이 손상되었거나 느슨해졌는지 확인하고 제때 교체할 수 있습니다. 문제가 지속되면 냉장고 내부 부품의 고장일 수 있습니다. 제조사나 전문 정비사에게 수리를 의뢰하는 것이 좋습니다.

전자레인지가 가열되지 않음

전자레인지가 가열되지 않는 현상은 다음과 같은 이유로 발생할 수 있습니다. 먼저 전자레인지의 플러그가 단단히 꽂혀 있는지 확인하고, 콘센트가 제대로 작동하는지 확인해야 합니다. 둘째, 전자레인지 내부에 음식물 찌꺼기나 먼지가 남아 있어 가열이 고르지 않거나 가열되지 않을 수 있습니다. 이때 젖은 천을 사용하여 전자레인지 내부를 청소하고 하단 회전반이 정상적으로 회전하는지 확인할 수 있습니다. 또한, 전자레인지의 가열관이 제대로 작동하는지 여부도 가열 효과에 영향을 미치며, 제조사에서 구매 및 교체도 가능합니다. 문제가 지속되면 제조사나 전문 유지보수 담당자에게 연락하여 수리를 받는 것이 좋습니다.

식기세척기 배수가 안 됨

식기세척기 배수가 안 되는 경우 다음과 같은 원인이 있을 수 있습니다. 먼저, 식기세척기 하단의 필터와 배수관이 음식물 찌꺼기로 막혀 배수가 제대로 되지 않는지 확인해야 합니다. 이때 필터와 배수관을 청소하여 원활한 흐름을 보장할 수 있습니다. 또한, 식기세척기 배수 펌프가 제대로 작동하는지 여부도 배수 효과에 영향을 미치게 되며, 펌프 연결이 느슨해졌는지, 새 펌프로 교체해야 하는지도 확인할 수 있습니다. 문제가 지속되면 제조사나 전문 유지보수 담당자에게 연락하여 수리를 받는 것이 좋습니다.

밥솥이 시작되지 않습니다

밥솥이 시작되지 않는 이유는 다음과 같습니다. 먼저, 전원 코드가 단단히 꽂혀 있는지 확인하고, 소켓이 제대로 작동하는지 확인해야 합니다. 둘째, 밥솥의 내솥이 올바른 위치에 바닥과 잘 밀착되어 있는지 확인합니다. 밥솥 내부에 물이나 습기가 쌓이면 시동에도 영향을 미칩니다. 이때 라이너를 청소하고 내부가 건조한지 확인할 수 있습니다. 또한 밥솥의 제어판이 제대로 작동하는지 여부도 시작에 영향을 미치며, 재설정을 시도하거나 다른 기능을 선택할 수도 있습니다. 문제가 지속되면 제조사나 전문 유지보수 담당자에게 연락하여 수리를 받는 것이 좋습니다.

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