When your computer automatically restarts repeatedly, the problem may be with the power supply. A power failure can cause voltage instability, which can lead to system instability. PHP editor Youzi will introduce in detail the various parts of the computer power supply and the automatic restart problems caused by faults, helping everyone to quickly find the root cause of the fault, repair the power supply in time, and eliminate the trouble of restarting the computer. Continue reading below to learn how failures in different parts of a power supply can affect system stability.
The computer power supply has two parts, the main power supply and the auxiliary power supply. The auxiliary power supply outputs +5VSB when connected to the mains power, and the main power supply starts when the computer is turned on and outputs +5V, +12V, +3.3V, -12V, -5V (some power supplies do not have it), these 5 channels are output at the same time, and there is no independent power supply circuit for the motherboard, CPU or hard disk. It is just that the power supply leads are separated, so there is no special part of the motherboard, CPU or hard disk. Power loss situation.
The automatic restart of the computer is usually caused by unstable power supply output voltage or weakened load capacity.
In the process of our daily use of computers, computer host power failure is a common problem, which may affect our work and Life brings a lot of troubles. Knowing how to identify and resolve computer host power failures is critical to maintaining the normal operation of your computer. This article will introduce you to some common computer host power failures and solutions to help you better deal with this problem.
Computer host power failure may appear as the computer cannot start, suddenly freezes, or the computer shuts down immediately after starting, etc. Here are some signs that may indicate a power supply problem:
The computer won't start and nothing happens when I press the power button. The computer suddenly freezes after starting up without any warning. The computer often shuts down automatically while running. The computer makes an unusual buzzing or noise when it is turned on.If you encounter the above situation, it is likely that the computer host power supply is faulty. Next, we will introduce some common solutions to help you deal with computer host power failure.
Poor contact of the power cord of the computer host may cause the computer to fail to start or suddenly crash. The solution is to check whether the power cord is plugged in properly, re-plug and unplug the power cord to make sure the connection is secure.
The power supply may malfunction due to overload or aging. You can try to replace it with another reliable power supply to test whether it is a power supply problem.
A power switch failure may cause the computer to fail to start or shut down. You can try to open the computer host with a screwdriver and check whether the power switch is normal. If there is any problem, replace the power switch.
Power module failure may be one of the causes of computer host power failure. You can disassemble the computer host and check whether the power module is burned or damaged. If there is any problem, it is recommended to ask a professional to replace the power module.
In some cases, computer host power failure may be caused by computer motherboard failure. If you suspect that the power failure is caused by a faulty computer motherboard, it is recommended to contact professional maintenance personnel immediately for repair.
In addition to promptly identifying and solving computer host power failure, preventing failures is equally important. Here are some suggestions to help you prevent computer host power failure:
Regular cleaning: Clean the computer host and power cord regularly, and ensure good ventilation. Pay attention to electricity usage: Avoid using low-quality power cords or connectors, and pay attention to the socket and power supply conditions around the computer. Avoid overloading: Avoid excessive use of the computer and be aware of overloading of the power supply. Regular maintenance: Regularly check the power supply and related components of the computer host to find and solve problems in time.Computer host power failure is a common problem during computer use, but as long as we can identify the problem in time and take effective measures to solve it, we can ensure the normal operation of the computer. We hope that the content introduced in this article can help you better understand the identification and solution of computer host power failure, prevent the occurrence of failures, and ensure the stable operation of the computer.
Computers are essential equipment in modern life and work, and power supply problems are one of the common computer failures. A computer power failure may prevent the computer from booting or even further damage other hardware components. This guide will help you understand the common causes of computer power failure and provide corresponding repair methods.
Causes of computer power failure may include power line failure, power supply problems, power switch failure, etc. Among them, power line failure may be caused by damaged wires or poor plug contact. Power supply problems may be caused by overloading or aging of the power supply. A faulty power switch may be caused by long-term use.
When the computer has booting problems, you first need to check whether the power line is well connected and confirm that the power plug and connections are not loose or damaged. If there is no problem with the power line, you may need to further check the power supply and switch conditions.
When troubleshooting a power failure, you can first try to use other proven and reliable power lines to connect to confirm whether there is a problem with the power line itself. If the problem persists after replacing the power cord, it is likely that the power supply is faulty. At this time, it is recommended to seek professional help. After all, the internal structure of the power supply is relatively complex and requires professional knowledge and equipment for repair.
If there is no problem with the power supply, the power switch may be faulty. At this time, the power switch can be disassembled and inspected to confirm whether there are any damaged or aging parts. Failures of the power switch also need to be repaired with caution and ensure that the operation is carried out under the guidance of professionals.
When performing power supply maintenance, be sure to pay attention to safety, especially when it comes to the power supply part. Make sure to operate in a power-off state and avoid touching high-voltage components to avoid accidental injury.
At the same time, if you do not have relevant maintenance experience and professional knowledge, it is best not to try to disassemble components such as the power supply to avoid more serious failures or safety hazards. It’s also wise to seek professional repair services or consultation.
Thank you for reading this computer power supply troubleshooting and repair guide. I hope it can help you better understand and solve computer power supply failure problems.
Computer power supply is a very important component of the computer system. It is responsible for providing a stable power supply to the entire computer system. But the power supply is also one of the most failure-prone components of a computer. When the power supply fails, it will seriously affect the normal operation of the computer. Therefore, it is very necessary to detect and troubleshoot power failures in time.
Power failure usually manifests itself in the following situations:
The power supply cannot be turned on: After pressing the power button, the computer screen, fans and other equipment cannot start, indicating that the power supply may have a serious failure. The power supply frequently shuts down automatically: During use, the computer will suddenly lose power or restart automatically. This is usually caused by unstable power output. The power supply makes abnormal sounds: The power supply makes abnormal buzzing or hissing sounds when working. There may be a problem with the internal components of the power supply. The power indicator light is abnormal: The power indicator light does not light up or keeps flashing, which may also indicate a power failure. Computer performance decreases: The computer runs slowly, and occasionally a blue screen or program crashes. This may be caused by insufficient power output from the power supply.When we find that the computer has the above faults, we need to carefully check and diagnose the power supply to find out the root cause of the fault. The specific diagnostic steps are as follows:
Check the power cord: First, check whether the power cord is in good contact and whether the cable is damaged. Observe the power indicator light: Check the status of the power indicator light to see if it lights up normally. Measure the power supply output: Use a multimeter to measure the output voltage of the power supply to see if it is within the normal range. Check the power supply fan: Observe whether the power supply fan can operate normally and cannot hinder the heat dissipation of the power supply. Replace the backup power supply: If no problem is found in the above steps, you can try to replace the backup power supply for testing.Based on the diagnosis results, we can take the following maintenance measures:
Replace the power cord: If the power cord is damaged, it needs to be replaced in time. Clean the inside of the power supply: Use compressed air to clean the dust inside the power supply to improve the heat dissipation effect. Replace the power supply fan: If the power supply fan fails, you need to replace it with a new one. Replace the power module: If the power supply still does not work properly after the above inspections and repairs, the entire power module needs to be replaced.Repair of power failure requires certain professional knowledge and operating skills. If you don’t know much about computer repair, it is recommended that you find professional maintenance personnel to check and repair it to avoid causing greater damage.
Through the above content, I believe you have a deeper understanding of computer power failure. If you encounter any power-related problems while using your computer, please feel free to contact us. We will do our best to provide you with professional and thoughtful service. Thank you for reading and wish you a happy use!
There are many, the common ones are no response when turning on, blue screen of death, automatic shutdown, unstable power supply, etc. These faults may be caused by poor contact of the power line, serious dust accumulation on the power supply fan, insufficient power supply, adapter failure, etc. If the above fault occurs, it is recommended to first check whether the power line is in good contact, clean the dust on the power fan, replace or repair the adapter, etc. At the same time, paying attention to keeping the computer cool and not operating it excessively can also effectively prevent the occurrence of power failure.
When the graphics card has related faults (such as problems with the GPU core, video memory, etc.), the output signal of the graphics card is abnormal, resulting in a white screen on the monitor, which is called a white screen.
Power failure is one of the common problems in computer hardware. If not handled in time, it may affect the normal operation of the computer. This article will introduce the analysis method of power failure to help you better understand the causes and solutions of power failure.
There may be many reasons for power failure. Here are some common reasons:
Insufficient power supply: Insufficient power supply to the computer may cause system instability or even crash. This may be caused by factors such as poor quality of the power cord, poor contact at the power plug, or unstable voltage at the power outlet. Insufficient power of the power supply: If the power consumption of the computer hardware is too high and the power of the power supply is not enough, the computer may run slowly or even crash. This situation may be caused by factors such as improper hardware configuration or aging hardware. Damaged power cord: Damaged power cord is also one of the causes of power failure. If the power cord is broken or the plug is damaged, it may affect the normal operation of the computer.For different causes of power failure, we can adopt different solutions. The following are some common solutions:
Check the power supply: First, we need to check whether the power supply is stable and whether there are problems such as unstable voltage or poor plug contact. If these problems exist, they need to be resolved in time. Replace the power supply: If the power supply is insufficient or other problems occur, the power supply needs to be replaced with a new one in time. When replacing the power supply, you need to pay attention to choosing a good quality brand and suitable power. Check the hardware configuration: Improper hardware configuration may result in excessive power consumption, causing a power failure. Therefore, we need to check whether the hardware configuration is reasonable, such as whether the CPU, graphics card and other accessories match. Repair the power cord: If the power cord is damaged, it needs to be repaired promptly. If it cannot be repaired, the power cord will need to be replaced with a new one.In short, power failure is one of the common problems in computer hardware. We need to carefully analyze the cause of the failure and adopt appropriate solutions. If you encounter power failure problems, you can refer to the analysis and solutions in this article, or seek professional advice.
The computer power supply is broken. The power supply has no output. When the power supply is under load and the DC voltage at each output terminal cannot be measured, it is considered that the power supply has no output. At this time, you should first turn on the power and check the fuse, and analyze the scope of the fault through the blown fuse.
1. If the fuse is blown and turns black, it means there is a serious short circuit. You should focus on checking the rectifier, filter and power inverter circuit.
(1) The AC filter capacitors C3 and C4 are short-circuited due to AC surge voltage breakdown. Some ATX power supply AC filter circuits are more complicated, so you should check whether there are short-circuited components.
(2) A diode in the bridge rectifier circuit of the main communication circuit breaks down. Cause of damage: Because the DC filter capacitors C5 and C6 are generally large-capacity electrolytic capacitors of 330μF or 470μF, the instantaneous charging current can reach more than 20 amps. Therefore, an instantaneous large-capacity surge current can easily cause a rectifier tube in the rectifier bridge with slightly poor performance to burn out. In addition, the AC surge voltage will also breakdown the rectifier diode and cause a short circuit.
(3) The DC filter capacitors C5 and C6 in the rectifier and filter circuit break down or even burst. Cause of damage: Because the withstand voltage of large-capacity electrolytic capacitors is generally about 200V, but the actual working voltage reaches about 150V, which is close to the rated value. Therefore, when the input voltage fluctuates or some electrolytic capacitors are of poor quality, breakdown capacitance may easily occur. In addition, when the electrolytic capacitor leaks, it will become severely heated and burst.
(4) The commutation diodes VD1 and VD2 and the power switching transistors VT1 and VT2 in the DC conversion circuit are broken down and damaged. Reason: Because the output voltage after rectification and filtering is generally around 300 volts, and the load of the inverter power switch tube is a rational load, the voltage peak formed by the leakage inductance may be around 600 volts, while the withstand voltage Vceo of VT1 and VT2 is only 450 volts. Fu left and right. Therefore, when the input voltage is high, some switching tubes with low withstand voltage will be broken down. Therefore, you can choose a power switch tube with higher voltage resistance.
2. The fuse is blown but does not turn black, indicating that it is not a short circuit that caused the fuse to blow.
(1) The fuse will blow out the moment the power is turned on, mostly due to the instantaneous large current that will blow out the fuse, such as the charging current of the DC filter capacitor when starting up.
(2) If the fuse is blown during use, it is mostly caused by excessive load.
3. Die Sicherung ist nicht durchgebrannt, da das Netzteil beispielsweise keinen Ausgang hat. Wenn die Sicherung intakt ist, sollten Sie prüfen, ob im Leistungssteuerkreis eine Unterbrechung oder ein Kurzschluss vorliegt, ob die Überspannungs- und Überstromschutzschaltung funktioniert, ob die Hilfsstromversorgung intakt ist usw.
(1) Der Strombegrenzungswiderstand THR des Kommunikationseingangskreises ist offen und die 300-V-Gleichspannung kann derzeit nicht gemessen werden. Das Schaltnetzteil verwendet einen 220-V-Direktgleichrichter-Filterkreis. Wenn die Wechselspannung angeschlossen ist, entsteht ein großer Stoßstrom (Kondensatorladestrom). Der Stoßstrom kann leicht dazu führen, dass der Strombegrenzungswiderstand durchbrennt.
(2) Die Hilfsstromversorgung verfügt nicht über einen +5-V-Spannungsausgang. Sie sollten sich darauf konzentrieren, die relevanten Komponenten im Hilfsstromkreis zu überprüfen, wie z. B. die VT15-Vibrationsröhre des Hilfsstromkreises ist beschädigt, die Spannungsreglerröhre VZ16, die Dioden VD30, VD41 sind ausgefallen und kurzgeschlossen und die Strombegrenzung Widerstand R72 ist möglicherweise defekt. 9. Wie erkennt man einen Ausfall der Computer-Stromversorgung?
1: Bereiten Sie einen Draht vor, jede Art von Draht reicht aus.
2: Entfernen Sie das Netzteil vom Computer, nehmen Sie das Kabel und stecken Sie es in die grüne Kabelschnittstelle des 24P-Steckers am Netzteil.
3: Das andere Ende kann in die Buchse eines beliebigen schwarzen Kabels am 24P-Kopf des Netzteils gesteckt werden. Schließen Sie nach dem Einstecken das Netzkabel an die Sitzreihe an.
4: Überprüfen Sie nach dem Anschließen beider Enden des Zuleitungskabels, ob sich der Netzteillüfter dreht. Wenn es sich normal dreht, können Sie sicher sein, dass die Stromversorgung in Ordnung ist.
Zur Erinnerung: Der 5-V-Strom des kleinen Kabels am 24P-Anschluss des Netzteils ist für den menschlichen Körper nicht schädlich, also haben Sie keine Angst.
10. Wie behebt man Fehler bei der Stromversorgung des Great Wall-Computers?
1. Überprüfen Sie das Netzkabel: Stellen Sie sicher, dass das Netzkabel intakt und ordnungsgemäß an den Computer und die Steckdose angeschlossen ist. Wenn das Netzkabel in irgendeiner Weise beschädigt ist, versuchen Sie es mit einem neuen.
2. Überprüfen Sie den Netzstecker: Stellen Sie sicher, dass der Netzstecker fest sitzt und richtig in die Netzbuchse des Computers eingesteckt ist.
3. Steckdosen und Steckdosenleisten: Wenn Sie eine Steckdosenleiste verwenden, stellen Sie sicher, dass die Steckdosenleiste ordnungsgemäß funktioniert und an eine funktionierende Steckdose angeschlossen ist. Versuchen Sie, Ihren Computer direkt an eine Steckdose anzuschließen, um Probleme mit der Steckdosenleiste zu beheben.
4. Starten Sie den Computer neu: Manchmal kann die Energieverwaltung im Computer Probleme verursachen. Versuchen Sie, den Computer vollständig herunterzufahren, einige Minuten zu warten und dann neu zu starten.
5. Externe Geräte trennen: Trennen Sie alle externen Geräte (z. B. Drucker, erweiterte Festplatten, USB-Geräte) vom Computer und starten Sie dann den Computer neu, um zu sehen, ob das Problem gelöst werden kann. Manchmal kann ein Fehler in einem externen Gerät die Stromversorgung des Computers beeinträchtigen.
6. Ausfall des Netzteils: Wenn die oben genannten Schritte das Problem nicht lösen, ist möglicherweise das Netzteil defekt. Zu diesem Zeitpunkt wird empfohlen, sich an das Kundendienstzentrum von Great Wall Computer zu wenden oder einen professionellen Techniker mit der Überprüfung und dem Austausch des Netzteils zu beauftragen.
Bitte denken Sie daran: Versuchen Sie nicht, das Netzteil oder andere Computer-Hardwareteile selbst zu reparieren, da dies zu weiteren Schäden oder Sicherheitsproblemen führen kann. Ausfälle von Computerhardware lassen sich am besten von Profis beheben.
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