The computer has been running for a period of time and has an automatic shutdown phenomenon, what is

You're in trouble in this situation.,Since the power supply has been changed, then try to change the motherboard.,Like this problem, you shouldn't be able to get out of the motherboard and the power supply.。

Hello friends:

The computer will automatically shut down after a while, mainly for the following five reasons: (including the treatment scheme below).

The first reason: there is a problem with the power supply, when the filter capacitor of the power supply is bulging, it is normal to start the boot, it has been used for a period of time, due to the bulging, resulting in leakage, insufficient power supply, the power supply starts to protect itself, cut off the power supply, and shut down, treatment method: replace the power supply.

The second reason: that is, the voltage of your place is unstable, when the voltage is not between 170V ---240V, there will be automatic shutdown and restart from time to time, Jianyi uses a UPS uninterruptible power supply.

It plays the role of voltage regulation protection.

The third reason: the virus destroys some files of the system, when it runs to a certain point, with the CPU usage and memory usage really continue to increase, after reaching 100%, the computer will freeze, automatically shut down, it is recommended to use antivirus software in safe mode.

If the antivirus does not work, reinstall the system.

Or one-click restore.

The fourth reason: that is, there is a problem with the CPU fan of the computer or a problem with the radiator (for example, the quality of the radiator is very poor, which also means that the thermal conductivity of the radiator is not very good): if there is too much ash on your CPU fan, the fan is stuck, resulting in the CPU not being cooled, when the temperature reaches the temperature set by the motherboard, the motherboard starts protection, and it will automatically shut down, when the quality of the radiator is poor, or the clip of the radiator is not tight, it will also cause automatic shutdown, the reason is the same as above, Jianyi, Clean the dust on the CPU fan, if the CPU fan is broken, replace a better fan and a good radiator OK, if the clip is loose, reinstall the clip.

At the same time, add some silicone grease paste to the CPU to help cool the CPU.

The fifth reason is that your computer uses something that can be scheduled to shut down.

If you set a time to shut down, there will be a phenomenon that it will shut down when the time comes, such as if you use: such as Thunderbolt.

Wait a minute. In the software settings, there is an action that automatically shuts down after completing a certain task. But generally the default setting is off. The purpose is to automatically shut down the computer when a task is completed when a task is running a more time-consuming operation.

Possible causes of automatic power outages:

First, after automatic shutdown If it can be turned on normally, then this situation belongs to the self-protection function of the system.

When the computer is overloaded or encounters other conditions that damage the CPU or system, poisoning, CPU usage is often 100 and so on. In order to protect the CPU from damage, the system automatically loses power. It is recommended to optimize the system.

Second, poor heat dissipation, which generally occurs when the CPU is overheated or the CPU is overloaded due to the long-term operation of the computer. Excessive dust and improper fan operation will lead to poor heat dissipation and overheating of the CPU, which will trigger the automatic power-off protection function. If this is the case, you need to clean the laptop fan, radiator.

3. Automatic power failure caused by external devices, removal of newly installed hardware devices, such as external cameras, printers, including upgraded memory, etc.;

Fourth, the notebook itself is faulty and needs to be specifically detected.

The computer will automatically shut down after a period of time, sometimes because of the power supply, sometimes because of the fan, and sometimes because your memory module is loose.

It could be a virus or internal part of your computer, or you may have set it to hibernation.

It's supposed to be hibernating, you just change the power option and turn off the hibernation.

The computer will automatically shut down after a period of time, probably because it will sleep after a long period of no operation, if you operate it will also shut down automatically, it may be a problem with the machine.

It may be that something is wrong with the system. You can try reinstalling the system or take your computer to a repair shop for repair.

It may be caused by the high temperature caused by too much dust in the CPU fan.

If so, clean up the dust from the CPU fan and heat sink, add a new heat sink silicone grease, and if the heat sink fan is broken, replace it. If it's not a problem, it may be caused by problems with motherboard parts or power supplies, voltage instability, hard disk failure, hardware overclocking, etc., and the new hardware is incompatible. In addition, a Trojan horse can also cause a shutdown due to a system failure, but the probability of this is very small, restore the system or try to reinstall it.

If it automatically shuts down or standby without operation, it may be a problem with the settings. Right-click on the desktop to select Properties Screen Saver Power Supply Select a scenario that suits you from the drop-down list in Power Usage Scenarios, and set Never in the list of Monitor Off, Hard Disk Off, System Standby, and so on below (or set a suitable time).

Open the control panel All Control Panel Items Power Options Select Turn off the monitor (select Never or Set Time) Select Change the computer sleep time on the left, and select Never or select the appropriate time (Win7 system) from the drop-down list next to Make the computer sleep.