What should I do if my computer won’t turn on? Power Troubleshooting and Repair Guide

The computer cannot be started, which may be caused by a power system failure. In order to solve this problem, PHP editor Yuzai provides a detailed power supply troubleshooting and repair guide. This guide will guide you through a systematic inspection of power components, including power cords, adapters, motherboard batteries, memory, and graphics cards. By following the steps in this guide, you can effectively identify and resolve power failures and quickly restore normal operation of your computer.

1. What should I do if the computer cannot be turned on? Power Troubleshooting and Repair Guide

What should I do if my computer can’t turn on?

Computers are indispensable tools in our daily work and life, but sometimes we encounter situations where the computer cannot turn on. At this time, it is very likely that there is a problem with the power supply. Next, let’s take a look at the guide for troubleshooting and repairing the power supply.

Troubleshooting steps:

When our computer cannot be turned on, we must first conduct troubleshooting. Check the following aspects:

Confirm whether the power socket is normal and whether the plug is loose. Check the power cord for damage and try another reliable power cord. Observe whether the power light is on to confirm whether the power supply is working properly. Check whether the power supply unit inside the computer host is normal. Note: Caution is required when handling internal components of the computer. It is recommended to seek professional assistance.

Power supply failure repair:

If the above troubleshooting confirms that the boot problem is caused by a power failure, you can perform the following operations:

Replace the power cord: If the power cord is damaged, it can be replaced with a new one. Clean internal dust: Excessive dust inside the power supply unit will affect heat dissipation and cause overheating shutdown. You can use compressed air or a hair dryer to clean the internal dust. Replace the power supply unit: If the power supply unit is damaged, it needs to be replaced with an identical or compatible new power supply unit. Check the power switch: If the switch is faulty, it needs to be replaced in time.

Be sure to disconnect the power supply and confirm safety before performing any maintenance operations. If you have no experience in computer repair, it is recommended to seek professional help to avoid causing greater losses.

Thank you for reading this article, I hope the above content can help you solve computer startup problems. If you have any questions or suggestions, please leave a message to communicate!

2. The TV power light is not on and cannot be turned on

The reasons and solutions for why the TV power light is not on and cannot be turned on

TV is an indispensable electrical appliance in our daily lives. It provides us with a variety of Entertainment and information. However, sometimes we may encounter the problem that the TV power light does not light up and cannot be turned on, which is very troublesome. Here, we will discuss the reasons why the TV power light does not turn on and how to solve it.

Common reasons

1. Poor contact of the power cord: Check whether the power cord behind the TV is loose or the plug has fallen off. If so, re-plug the power cord firmly.

2. Power socket problem: Check whether the power socket is working properly. You can try plugging in and unplugging other electrical appliances to verify the effectiveness of the socket.

3. Power switch problem: Make sure the power switch is turned on. Some users may accidentally turn off the power switch and the TV cannot be turned on.

4. Power supply problem: The power supply module of the TV may be damaged, so you need to seek help from professional technicians.

Solution

1. Check the power cord connection

First, check whether the power cord is tightly connected to the TV. Try reseating the power cord and making sure the plug is seated correctly in the outlet. Next, check whether the power cord is damaged or aged. If so, it is recommended to replace it with a new one.

2. Test the power socket

If the power cord is connected normally but the TV power light still does not light up, then the power socket may be faulty. You can try plugging in and unplugging other appliances to verify that the outlet is working properly. If other appliances work fine, the problem may be with the TV. Vice versa, you may need to check the outlet or seek help from a repairman.

3. Check the power switch

Sometimes we may ignore the status of the power switch. Make sure the TV's power switch is on. Some TVs may have the switch on the back or side. If the switch is turned on but the TV still won't turn on, the power supply module may be faulty.

4. Contact professional maintenance personnel

If the above methods cannot solve the problem, then the power supply module of the TV may be damaged. At this time, the best solution is to contact professional maintenance personnel. They have the experience and professional equipment to detect and repair TV faults.

In summary, TV power lights not lighting up and not turning on are common problems, but they usually have simple solutions. We can first check the connection of the power cord, verify whether the power socket is working properly, and confirm whether the power switch is turned on. If the problem persists, it’s best to contact a professional repairman to troubleshoot your TV. Keeping the TV working properly is very important to our lives, so we must solve these problems in time to ensure the long-term stable operation of the TV.

3. Can’t turn on the computer due to power protection?

Specific solutions are as follows:

1. Unplug the power plug, then press the computer power switch to drain the remaining power in the host, then connect the power and restart (if it doesn’t work, go to the next step, the same below);

　2. Open the case, wash your hands and dry them with clean water, unplug the memory module, turn it on and off, re-insert the memory module and turn it on;

　3. Unplug the graphics card, then re-insert it and connect the graphics card and monitor. , turn on;

　4. Unplug the hard disk data cable and power cord, power on and off, re-insert the data cable and power cord, turn on;

　 5. Find the motherboard battery, remove it carefully, do not use excessive force and use tools To scratch other components, short-circuit the two contacts of the battery on the motherboard (not the positive and negative terminals of the battery), turn on the power, then put the battery back into its original position and turn on the phone;

　6. Disconnect the host and other (monitor) ) components, turn on the computer and observe the hard disk lights of the host to see if the host is running;

　7. Find experienced people to handle it;

　8. Send it for repair.

4. The laptop malfunctions, suddenly shuts down and cannot be turned on?

It’s almost exactly the same. When I played the third game, the battery ran out and it shut down. Not long after restarting, it suddenly turned off in a blink of an eye. After that, it couldn’t be turned on again, as if it was dead. 5. Host power supply The light is not on and the computer cannot be turned on

The host power light is not on and the computer cannot be turned on. This is one of the problems that many computer users may encounter during use. When you press the power button and find that the power light of the host computer does not light up and the entire computer cannot boot normally, this situation often makes people feel anxious and troubled. Today we’ll dive into the possible causes of this issue and how to fix it.

Possible reasons:

1. Power cord problem: First check whether the power cord is plugged in properly, whether the socket is normal, and whether the power cord is damaged. 2. Power supply problem: It may be that the internal power supply of the host has failed, causing the power to be unable to be supplied to the motherboard and other hardware normally. 3. Motherboard failure: Circuit problems or component damage on the motherboard can also cause the host's power light to turn off and fail to boot. 4. Memory failure: Poor contact or damage to the memory module can also cause the computer to fail to boot. 5. Graphics card problem: Graphics card failure will affect the normal startup of the computer.

Solution:

For the problem that the power light of the host does not light up and fails to boot, we can try the following solutions:

1. Check the power cord: Make sure that the power cord plug is firmly connected to the power socket, and there is no looseness or poor contact. . 2. Check the power supply: If you suspect a power supply problem, you can try to replace it with a stable power supply to test. 3. Troubleshoot the motherboard: Check whether the components on the motherboard are burned out or short-circuited. If necessary, send the motherboard for repair or replace it. 4. Check the memory: Remove the memory module and reinsert it into the slot, and clean the slot and memory gold fingers to see if the boot problem can be solved. 5. Check the graphics card: Re-insert and unplug the graphics card, clean the slot and the gold finger of the graphics card, and confirm that the graphics card is not faulty.

If the above methods cannot solve the problem, it is recommended to contact professional computer maintenance personnel for maintenance in time to avoid further deterioration of the problem. Regular maintenance and upkeep of computer equipment is also important to reduce the occurrence of such failures.

Conclusion:

When you encounter the problem that the power light of the host is not on and the computer cannot be turned on, don’t panic. You can solve the problem by investigating the possible causes one by one and taking corresponding solutions. If you cannot solve it yourself, be sure to seek professional help to avoid further damage to the equipment.

6. The computer has a blue screen and cannot be turned on after unplugging the power?

1. Turn on the computer and press F8 until the advanced options appear. Release it, select "Last Known Good Configuration" and press Enter to repair.

2. Press F8 on boot to enter safe mode and then exit. Select restart or shutdown before booting to enter normal mode (repair registry).

3. If the fault persists, use the system restore that comes with the system to restore it to the time when the fault did not occur (or use restore software to restore the system).

7. The power supply of Huawei computer flashes and cannot be turned on?

The reasons and solutions for the host's power flashing and failure to boot are as follows:

1. It may be a problem with the memory module. Unplug the power first. After a few seconds, unplug the memory module and wipe the "golden finger" of the memory module with rubber glue. , try several times to recover.

2. When the monitor has a black screen and no image is displayed, first check whether the host power supply is plugged in well, whether the fan of the power supply is rotating, whether the power indicator light and hard disk indicator light on the host panel are flashing, because if the host power supply does not work or the motherboard When there is no power supply and the monitor does not receive a signal, of course there will be no image display.

3. Check again whether the power supply of the monitor is plugged in well. If the power switch of the monitor is a touch switch, you should hear a slight popping sound when the monitor is powered on. At this time, you can judge that the switching power supply circuit of the monitor is good. Check whether the power switch of the monitor is turned on, whether the power indicator light of the monitor is on, whether there is a hissing sound when you approach the monitor screen with your hand and move it slowly, and whether the hair on your hands feels like it is being sucked up. This is a sign of checking the monitor. Is the high voltage circuit working properly?

8. The computer power button is whining and cannot be turned on?

1. The power supply is broken and needs to be repaired or replaced. Unless it's a very expensive high-power power supply, few technicians are willing to repair it. It's just a replacement, which costs tens or hundreds of dollars.

2. Major accessories (such as graphics cards, motherboards, etc.) have serious short-circuit faults, resulting in power overcurrent protection and inability to boot. The damaged accessories need to be replaced.

The specific details will only be known after testing. I cannot pinpoint the fault just by listening to your description.

9. The computer power button flashes and cannot be turned on?

1. First, we disassemble the host and listen to see if there is any fan sound.

2. If there is a fan spinning, such as a CPU or graphics card, you can eliminate the problem there.

3. Then check whether the line interface is loose. If so, plug it in more tightly.

4. If it still doesn’t work, it should be a memory problem.

5. We can unplug the memory stick, wipe the gold finger on it with an eraser, and then plug it back in to solve the problem.

10. The power supply voltage of the computer is not enough and it cannot be turned on?

1. Computer power supplies are now using ATX power supplies, and the general voltage range is around 200~240. If it's too low, it may not start, or it may keep restarting erratically.

2. If the voltage is indeed too low, it is recommended that you purchase an ultra-low voltage power supply or add a regulated power supply.

3. When the voltage is too low, the computer will automatically restart during peak power consumption, and will generally not be unable to boot.

4. The above description cannot confirm that the power supply voltage is too low. It is likely that the motherboard and other hardware quality problems have caused a short circuit and the power supply automatically shuts off for protection.

5. If the peripheral components are not short-circuited, it may be a problem with the motherboard itself. Finally, if other components have been ruled out, just replace the motherboard and try it!

6. If the fault persists, unplug the Power switch and Reset line on the motherboard and other switches and indicator lights, and then use a screwdriver to short-circuit the switch to see if it can be turned on.

7. If the computer cannot be turned on, then use the minimal system method to unplug the data cables of the hard disk, floppy drive, and optical drive, and then check whether the computer can be turned on. If a startup screen appears on the computer monitor, it means that the problem is in these devices. Then connect more than one device to the computer one by one. When a certain device is connected, the fault reappears, indicating that the fault is caused by this device. Finally, focus on checking this device.

8. If the fault persists, the fault may be caused by memory, graphics card, CPU, motherboard and other equipment. Then use the plug-in method, swap method and other methods to check the memory, graphics card, CPU and other devices respectively

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