There are many reasons why the computer can't be turned on. I'll list them, and you can compare them yourself and see why.

I. Possible causes of hardware

1, poor heat dissipation

Monitor, power supply and CPU will generate a lot of heat in the working process, so it is very important to keep good ventilation. If the monitor is too hot,

Heat can lead to color and image distortion, and even shorten the life of the display. Working for too long will also lead to poor heat dissipation of the power supply or monitor, resulting in electricity.

Brain shutdown. The heat dissipation of CPU is an important issue related to the stability of computer execution, and it is also the "hardest hit" where heat dissipation failure occurs, which needs to be guaranteed.

Prove its good heat dissipation effect.

2. Improper exercise

When the computer is moving, it often makes the internal devices of the machine loose, resulting in poor contact and computer downtime.

When moving the computer, you should avoid violent vibration. In case of downtime at ordinary times, you can also check whether each patch panel is loose, and you can pull it out and plug it in again.

3. Dust Black Boy

Excessive dust accumulation in the machine can also lead to downtime. For circuit boards, dust is like a time bomb. In addition, a magnetic head such as a floppy disk drive

Or the laser head of the CD-ROM drive is contaminated with too much dust, which will lead to reading and writing errors, which will seriously lead to computer downtime. Therefore, it is necessary to prevent dust in the computer room.

Always pay attention.

4. Equipment mismatch

If the main frequency of the motherboard does not match the main frequency of the CPU, the old motherboard will set the external frequency too high when overclocking, which may not guarantee the stability of execution, so

Resulting in frequent downtime. This is mainly because the matching of all parts of the compatible machine is not done well. Therefore, when choosing a compatible computer, please find someone who is more expert.

Help choose accessories.

5. Software and hardware are incompatible

Three-dimensional software and some special software sometimes can't be started or even installed normally on some microcomputers, and there may be compatibility problems between software and hardware.

All aspects of the problem.

6. Memory loss

It is mainly caused by loose memory chips, virtual welding or quality problems of memory chips themselves. Contact failure of memory stick should be eliminated according to specific conditions, such as re-unplugging.

Insert it. If there is a problem with the quality of the memory stick, it needs to be replaced to solve the problem.

7. Hard disk failure

Bad tracks and bad sectors are mainly caused by aging or improper use of hard disk. This makes it easy for the machine to stop during execution. On the hard disk

Faults must be repaired by special tools, software and maintenance personnel. If the damage is serious, only the hard disk can be replaced. In addition, for those who do not support

UDMA

The motherboard of 66/ 100 should pay attention to the setting of hard disk execution mode in CMOS.

8.CPU overclocking

Because CPU overclocking improves the working frequency of CPU, it may also make its efficiency unstable. The reason is that CPU is stored in memory.

The speed of fetching data is faster than the speed of exchanging data between memory and hard disk, and overclocking makes this contradiction more prominent and intensifies in memory or virtual memory.

When the required information cannot be found in the memory, an "abnormal error" will occur. The simple solution is to get the CPU back to normal.

In frequency.

9. Hardware resource conflict

This is because there is a conflict between the settings of the sound card or the graphics card, resulting in an abnormal error. In addition, the ports of interrupts, DMA or other devices will conflict.

Otherwise, a few drivers may be abnormal, resulting in downtime. The solution is to start in "Safe Mode" in the Control Panel →

Make appropriate adjustments in System → Equipment Management. If the driver has an abnormal error, you can modify the registry file. choose

Select "Execute", enter "REGEDIT", enter the registry editor, and find and delete the driver through the "Query" function under the menu.

All primary keys and key values related to the prefix string will be restarted.

10, insufficient memory capacity.

The larger the memory capacity, the better, at least 0,5% ~1%of the hard disk capacity. If there is a problem in this regard, we should try to change the capacity.

A big memory stick. Or add a new memory stick to the original memory.

1 1, inferior parts

A few unscrupulous businessmen use inferior motherboards and memory when assembling compatible machines for customers, and some even sell fake motherboards and old ones.

CPU, memory, these will make the machine very unstable during execution, and downtime is inevitable. Therefore, users should have this side when purchasing a machine.

If you are wary, ask your familiar friends to help you choose. You can use some updated tools and software to test your computer and wear it for a long time (for example,

72 hours), strive for the longest warranty time.

Secondly, it is possible. ......

Why can't the computer be turned on? After a long time, it can be turned on again. What should I do?

Press F8 immediately after starting the machine, and high-level options will appear. Let go, select "Last Correct Configuration" and press Enter to repair. Now you can't press F8 to enter safe mode to restore the system or charging system (if charging is also downtime, it is recommended to repair). If you can enter the safe mode, all inappropriate things downloaded before the accident will be uninstalled.

Soft before hard, such problems are caused by software conflicts, inappropriate drivers and system problems. Can you restore the system in safe mode, or can't reinstall the operating system, and don't install software, patches, drivers, etc. , see if there is any problem with the boot? Don't install drivers, patches and software step by step, and don't install them if you find them inappropriate.

Hardware is the reason. Pull out the motherboard battery to discharge, plug in and out the memory, clear the graphics card, and check whether there is any problem with the hard disk. If it doesn't work, fix it.

Why does the computer always fail to open the 360 browser?

Before cattle antivirus, it seemed that it was also on the anti-360 side during the QQ360 war.

So it should be normal not to install 360.

You can use another browser.

For example, Opear, Google, IE9 and so on are all very fast.

Still have to use 360 browser.

You can change the antivirus software to 360 security guards +360 antivirus.

It's all free

What's going on here? The computer is broken and nothing can be opened.

Hello, please click OK, and then see if the antivirus software in the lower right corner can be opened. If yes, immediately check and kill computer viruses. If you can't open the antivirus software, you have to reinstall the operating system.

Why can some computers open some web pages and some computers can't?

There are many reasons why IE can't open the webpage, including system problems, network and network settings, and more likely it is the webpage or website server. Of course, some people artificially set reasons, which are determined by the national conditions, so I won't comment and explain here.

So, what are the common factors that IE can't open the webpage? How to solve it yourself?

1, virus program infringement

Reason: When IE is destroyed by computer network virus or malicious program, it is easy to make it impossible to browse the webpage.

Solution: Try to use an antivirus program such as "IE Repair Expert" to repair (it is recommended to repair in safe mode). If it fails, recharge IE.

2. Network Settings

Reason: The network settings and networking methods of computers are different.

Solution: In view of some networking methods through local area network, IP address, gateway, DNS server and so on need to be set manually. Especially those who use proxy servers, sometimes you need the network administrator to help you set it up correctly.

3.DNS server settings

Reason: When IE can't browse the webpage, you can try to access it with IP address first. If you can, it should be a DNS problem. The DNS problem may be an error in obtaining DNS during networking, or it may be an error in the DNS server itself.

Solution: Set the specified DNS service correctly (the address can be the DNS server address provided by your local ISP, or you can use the DNS server address that can be used normally in other places. ) In the network properties, (Control Panel-Network and Dial-up Connections-Local Connection-Right-Click Properties-TCP/IP Protocol-Properties-Use the following DNS server address). Different ISPs have different DNS addresses. Sometimes the router or network card can't connect to the ISP's DNS service. In this case, you can turn off the router temporarily or reset the router.

4. There is something wrong with the local DNS cache.

Reason: In order to improve the speed of accessing websites, the system will automatically store websites that have visited and obtained IP addresses in the local DNS cache. Once you visit the website again, the IP address of the website will be taken directly from the local DNS cache for access without going through the DNS server. Therefore, if there is a problem with the local DNS cache, the website will be inaccessible.

Solution: start > execute > execute ipconfig /flushdns to rebuild the local dns cache settings.

5. Set the system firewall correctly.

Reason: In the process of setting up the system network, the security level was too high, and IE was accidentally put into the blocked access list, and the wrong firewall access policy was set, which may cause IE to fail to open.

Solution: Try to check the access policy, lower the security level of the firewall, or simply turn off the firewall.

6, computer network protocol settings

Reason: This problem is very professional and the network protocol is very complicated. Here I will focus on the basic TCP/IP routing protocol.

The foundation of network is the construction and application of many computer network protocols. So how do we understand this concept? Computer network communication protocol (usually called "network protocol") is a set of definitions of information format and information content of communication between computers, which can be accepted by the receiver and the sender. In order to realize the function of OSI seven-layer reference model, each layer has many communication protocols that are responsible for different aspects and solve different problems. If the physical layer has physical interface communication protocols (such as RS-232, RS-449 and V.35), the data link layer has data link protocols (such as CSMA/CD, SDLC and HDLC), the network layer has many routing layer protocols (such as IP, RIP, OSPF and IGRP), and the transport layer has many transmission control protocols (such as TCP, FTP and TFFP). Similarly, there are many corresponding network protocols in session layer, presentation layer and application layer (such as POP3, SMTP, SNMP and DNS in application layer). It is under the interaction of many communication protocols that all the seven-layer models of the network can work normally and ensure the normal communication of the network.

Solution: Network protocol is a kind of special software and the most basic mechanism for computer network to realize its functions. The essence of network protocol is the rule that all kinds of hardware and software must follow the same code. But the network protocol is not. ......

The computer won't open! How can I open it?

After the computer enjoys the file, it can't be opened on the computer. Solution:

First, if there is an error "Network path not found", ping the IP address first. If the PING fails, you need to confirm whether it is connected to the network or whether the network connection is normal. Then check whether the firewall is enabled or whether the corresponding port is blocked. If the PING IP address is normal, but the computer name of the PING target machine is not available, you need to check whether there is a problem with the network name resolution. First, check whether there is a problem with all client machines or one machine. If there is a problem with the name resolution of all machines, you need to check it on the DNS or WINS server on the network. If only one machine has a problem, you need to check the hosts and lmhosts files first; If it is normal, you can re-register the DNS name.

2. If "xxx computer is inaccessible" appears, you may not have permission to use network resources. Please contact the administrator of this server to determine whether you have access rights. This may be because the security settings of the computer have been changed, making the target computer inaccessible. You can take the following steps to solve the problem:

1. Open My Computer and select Tools-> from the menu; "folder options"->; "View", clear the selection of "Enjoy the wizard with * * * (recommended)".

2. Right-click My Computer, select Manage, and then select Local Users and Groups->; Users, right-click the guest user, select Properties, and clear the account disabled selection.

3. click "start"->; "execute", enter secpol.msc, and select "local policy"-> on the left; "User Power Distribution", double-click "Access this computer from the network" on the right to make sure everyone is in it, and double-click "Deny access to this computer from the network" on the left to make sure it is empty.

4. select "local policy" on the left->; "Security Options", a. Confirm that "Network Access: Access and Security Mode of Local Accounts" on the right is "Classic"; B. Confirm that "Microsoft Network Client: Enable Communication Digital Signature (always)" on the right is "Disabled"; C. Confirm that "Microsoft Network Client: Enable digital signature for communication (if allowed by the server)" on the right is "Enabled"; D ensure that "Microsoft Web Server: enable digital signature for communication (always)" on the right is "disabled"; E. confirm that "Microsoft web server: enable communication digital signature (if allowed by the server)" on the right is "enabled".

5. Restart the computer.

After the computer is shut down normally, why can't it be opened?

Troubleshooting of computer startup without display. (No alarm sound) Step 1: First, check whether the external wiring of the computer is connected properly, then plug in all the wiring again to see if the fault is eliminated. Step 2: If the fault still exists, open the main chassis, check whether there are redundant metal objects in the chassis or short circuit caused by the deformation of the motherboard, smell whether there is burning smell in the chassis, whether there are burnt chips on the motherboard, and whether the capacitors around the CPU are damaged. Step 3: If not, clean up the dust on the motherboard, and then check whether the computer is normal. Step 4: If the fault still exists, unplug the reset wire and other switch and indicator wires on the motherboard, and then short-circuit the switch with a screwdriver to see if it can be turned on. Step 5: If you can't boot, unplug the data cables of hard disk, floppy disk drive and CD-ROM drive with the minimum system method, and then check whether the computer can boot. If the boot screen appears on the computer monitor, the problem is with these devices. Then connect the above devices to the computer one by one. When the equipment is connected, the fault reappears, indicating that the fault is caused by the equipment. Finally, focus on checking this equipment. Step 6: If the fault still exists, it may be caused by memory, graphics card, CPU, motherboard and other equipment. Then check whether the memory, graphics card, CPU and other equipment are normal by plugging and swapping, and replace them if they are damaged. Step 7: If the memory, graphics card, CPU and other devices are normal, then discharge the BIOS, put the motherboard outside the chassis in isolation mode, and connect the memory, graphics card, CPU and so on for testing. If the computer can display, then put the motherboard into the chassis for testing until the cause of the failure is found. If the fault still exists, the motherboard needs to be returned to the manufacturer for repair. Step 8: When the computer is turned on, there is no display, only an alarm sound. When the computer is turned on, the system BIOS starts POST (power-on self-test), and when a fatal error is detected in a device in the computer, the speaker is controlled to sound and report the error. Therefore, there may be a failure without alarm sound when starting the machine. When there is no alarm sound when the computer is turned on, we can check the faulty equipment according to the meaning of BIOS alarm sound and troubleshoot it. Fault diagnosis When the computer can't be turned on, the following tests should be carried out: (1) First, check whether the power cord of the computer is connected correctly. If it is normal, open the main chassis and check whether the motherboard power cord is normally connected to the motherboard power interface. (2) If the connection is normal, check whether there are redundant metal objects in the main chassis or whether the motherboard is in contact with the chassis. If there is, it may be unable to boot because of short circuit. (3) If there are no redundant metal objects in the chassis and the motherboard is not in contact with the chassis, unplug the power switch wire of the motherboard and short the power switch interface of the motherboard with tweezers. If the computer can start, it may be that the power switch cable on the chassis is in poor contact or damaged, so just repair the power switch cable. (4) If the motherboard power switch is short-circuited and the computer can't start, then unplug the power cord on the motherboard, and use a wire to short-circuit the green hole of the power connector connecting the motherboard power interface with the black hole next to it, and observe whether the fan of the power supply rotates. If the fan does not turn, it may be that the power supply is damaged. Replace the power supply. If the power supply fan rotates, the fault may be caused by the failure of the motherboard switch circuit. Then use a multimeter to test the switch circuit of the motherboard and eliminate the fault. Unable to start the operating system. Various diagnostic methods are as follows. First, check whether the operating system has started when the computer is turned on. If there is shutdown, blue screen or automatic restart when the operating system is started, it means that the partition slot table and the hard disk master boot record are normal, and troubleshooting causes such as partition slot table damage, hard disk master boot record damage, hard disk partition slot end flag loss, etc. Then use the following methods for diagnosis. Step 1: First, start the computer in safe mode to see if it can be started. If it can't start, it may be infected with a virus, lost system files, damaged operating system, damaged hard disk, hardware device conflict or hardware problems. Go to step 4. If the safe mode can be started, it may be that the hardware driver is incompatible with the system, the operating system has a problem or a virus infection. Step 2: Then run anti-virus software. If there is a virus, it may be caused by it. After antivirus, restart the computer. If it is not normal, you need to reinstall the operating system. Step 3: If no virus is detected, you can use the "System Recovery" function of the operating system to recover the system. If the system is normal after recovery, it will fail. ......

The files on my computer suddenly can't be opened. Why?

Cause analysis and solutions of word failure: First, the virus prevented word from being opened, and some infectious viruses destroyed the components on which office word depended when it was executed, resulting in word not being executed normally. After infected with exe file, word file can't be opened, which generally leads to the prompt that Microsoft office word needs to be closed when it encounters problems. Even recharging word2003 can't solve the problem that word2003 can't be opened.

Second, after the virus infected word.exe, some system security tools or anti-virus software were not completely removed, or only the virus files were deleted, but the damaged system files were not repaired. In this case, the word file cannot be opened, and many users can only refill it to solve the problem that word cannot be opened.

Third, there is the destruction of public template files. The destruction of normal.dot leads to the failure of word.exe to execute normally, which will also lead to the failure to open word. Solution: In the first two cases, using the latest version of Kingsoft Internet Security to quickly kill and kill can help you solve the problem that word cannot be opened due to virus.

Finally, if a commonly used template file is deleted, office will automatically rebuild a new template file, and delete it by finding "normal.dot" in C: \ Documents and Settings \ Administrator \ Application Data \ Microsoft \ Templates, which can solve the problem that the word file cannot be opened.

Note: Folders are hidden, so the folder option should be to show hidden files and folders. In the Tools menu of Explorer, open the Folder option, view the page, and then select View Hidden Files and System Files. Delete these two templates, restart word, and the word file can be opened normally. The third method is often used by me to solve the problem that word can't be opened.

What happened when the computer suddenly shut down and couldn't be opened?

1, the heat dissipation is poor, and it is very important for the CPU to keep good ventilation. Working long hours can also lead to. The heat dissipation of CPU is also an important cause of computer failure. There is too much dust in the cupboard. Please clean it in time to keep the interior dry and clean. It may be that the memory stick is loose, so it should be pulled out and checked for damage. Aging or improper use of hard disk is also one of the reasons. 4. There are compatibility problems between software and hardware. 5. Memory usage is too large, unnecessary programs are terminated or memory allocation is insufficient. 6. There are logical or physical bad tracks on the hard disk. 7. The virus was downloaded by antivirus software. 8. There are too many junk or fragmented files. I suggest you go to cclean regularly. It can also restore the system, which is convenient and simple. 9. Check whether the capacitor in the computer motherboard bursts. 10. Charging system.

The computer can't open the software. What happened? Only safe mode can open the software.

If all software is uninstalled and recharged in this way, if all software is uninstalled in this way, see the following answer.

If you mean to start the computer, don't operate it immediately after the computer starts, because the background is loading the program when the computer starts, and it will be operated later. If it's not turned on. Is it the card? Try not to get your computer stuck. If it's not the card, uninstall what you downloaded before the accident, download Win Cleaning Assistant to kill Trojans, and don't switch to other software. In the aspect of killing Trojans, there is no software such as Win cleaning assistant, recovery system and recharge.

Use the system restore method that comes with the system:

System Restore Attached System: Start/Programs/Accessories/System Tools/System Restore, click Restore my computer to an earlier time, and then click Next. You will see a dark date on the date page, which is the restore point. After selecting, click Next to restore the system (Win78 10).

Ask me any questions.