Analysis: Why DVR crashes

In the process of using PC-type hard disk video recorders, it will inevitably encounter many sudden failures such as crashes, for the newer machines that are normally working normally, most of them are caused by the software stopped responding, as long as the forced shutdown With these unresponsive software, the computer can resume normal operation by holding the ctrl and alt keys first, and then pressing the del key. The "Close program" window appears. Select the name of the software whose name is "Stop responding" with the mouse. Press the "End Task" button. If the crash is too serious, even the "Close Program" window cannot be displayed or the "blue screen" appears. Then you can only press the key combination or the reset key again to restart the computer. If you encounter the following situations, what should you do?

First, encounter blackouts

Monitors, mainframes, speakers, etc. will be forcibly closed in one instant. Document data that is being written is lost. If you are performing disk read/write operations, it may also produce bad tracks. Instant voltage fluctuations during power outages can also impact computer hardware chips, circuits, and resistors. In order to avoid accidents, when installing the computer, it is best to choose a brand power supply, which can minimize the adverse effects of voltage fluctuations on the hardware from the power supply. After a power failure, turn off all power to prevent the monitor and atx power from starting at the same time when the next call comes in. This will cause damage to the hardware. When you use the word to edit the document, use the word's auto-save function. If the power outage happens to be on the disk, the next time you boot, do not skip the disk detection at startup to detect the occurrence of bad sectors. Once bad roads are found, use Norton, PQMagic and other tools to repair or shield the bad sectors. In addition, if economic permission is available, an ups can be selected to provide power-off protection for the computer.

Second, the power is old

When upgrading a computer, for example, installing a newly purchased high-speed optical drive, due to higher speed, power consumption, increased power load, there will be a crash or restart phenomenon. The original power supply did not take into consideration current power consumption of hard disks, video cards, and high-speed optical drives, so the output power of the power supply was not too high. Plus, some of the no-name power supplies themselves “shrink” and could not provide enough power when the system The increase in the number of equipment, power consumption becomes larger, the output voltage of poor quality power supply will be sharply reduced, eventually leading to system instability, automatic restart phenomenon. In addition, poor contact of the power socket, excessive voltage fluctuations may also cause damage to hard disks and other devices. You can replace a high-power, high-quality power supply that will give your computer the most security.

Third, automatic shutdown

Today's mainstream motherboards have a temperature monitoring function on the CPU. Once the CPU temperature is too high and exceeds the temperature set in the motherboard bios, the motherboard will automatically cut off power to protect the relevant hardware. On the other hand, power management and virus software in the system can also cause automatic shutdown. If the above abrupt shutdown phenomenon occurs frequently, first confirm that the heat dissipation of the CPU is normal. Open the box and visually check whether the fan blades are working properly. Then enter the bios option to see the fan speed and CPU operating temperature. If the fan is a problem, perform related dust removal maintenance on the fan or replace the fan with better quality. If the power supply is aged or damaged, it can be confirmed by replacing the power supply. If the power supply is broken, replace it with a new one to prevent burning the hardware. Of course, it may also be poisoning, enter the system, cover the installation of power management from the installation CD, and then thoroughly kill the virus. At the same time, it is necessary to constantly update the antivirus software virus database and use less pirated disks. Do not download unsolicited mail attachments.

Fourth, system failure

Can not enter the system, start the screen is still, or show: thediskiserror etc. There are many phenomena prompted by the e-text. The more common reason is that system files have been modified, corrupted, or loaded with abnormal command lines. In addition, the failure of the hard disk is also one of the reasons. The first thing to try is to be able to enter safe mode. Press the f8 key and select the third item in the boot menu: safemodel. After entering the safe mode, you can find the fault through the device manager and the system file checker. You can check whether there is a "!" It is also possible to reinstall the driver, and the system file can be recovered from the installation file (you can copy the windows installation disk to the hard disk in advance). If you can not even enter the safe mode, through the boot with the CD-ROM or floppy boot to dos, dos under the first anti-virus and use dir to check the c drive system file is complete, if necessary, through the system floppy sysc:, restore Related basic system files. If there is no file found in the c drive, only the system reinstall is performed.

Fifth, the system is down

The desktop is locked or blue screen, the mouse can not move, even when the hot start (alt + ctrl + del) will not work. In addition to the system's own bugs and compatibility problems between software, it may also be that running too many programs at the same time causes the process to block and cause a crash. When the machine is true or false, press the numlock button, and the indicator lights change as false. FALSE When you can press alt+ctrl+del at the same time to select the program name in the list of tasks that appear, and then mark the items that have no response, click End Task. Reality is solved through cold start. For a blue screen, press the RESET key after pressing the ESC key.

Six, boot black screen

The boot of the computer must first be powered by the power supply, and then the motherboard bios boot self-test, and then cpu, memory, graphics, hard drives, optical drives and other checks, if this step out of the middle, the computer can not start properly, or even Black screen. First, make sure that the monitor, mainframe power, and other external connections, and the internal connections between the host power supply and the host power supply interface are connected smoothly. Graphics card, memory due to the use of long, long-term contact with the dust in the air, the formation of the gold finger on the oxide layer can cause poor contact. Wipe the cheat with cotton, alcohol, and dry it until it's back. In addition, observe whether the CPU is working properly, turn on the machine for about half a minute, and touch the CPU fan's heat sink to see if there is temperature. With temperature, the possibility of a broken CPU can be ruled out. No temperature to sort out the cpu socket to ensure contact with place. After this there is no temperature, it may be a cpu problem.

Seven, equipment loosening and aging

During the process of moving the device, a lot of vibration will often cause the internal devices of the machine to loosen, resulting in poor contact and causing the computer to crash. Therefore, when the computer is moved, severe vibration should be avoided. Normally, you can check whether the boards are loose when you find a crash. You can unplug them and plug them in again. The looseness of the memory, the lack of soldering, or the quality of the memory chip itself. Should be based on specific circumstances to exclude memory contact failure, such as re-plug it. If there is a problem with the memory quality, you need to replace the memory module to solve the problem. Hard disk aging or bad use caused bad sectors, bad sectors. This will cause the machine to crash when it is running.

Eight, hardware resource conflicts

If the motherboard clock frequency and cpu clock frequency do not match, when the old board is overclocked, the FSB will be set too high, and the stability of the running may not be guaranteed, resulting in frequent crashes. This is mainly due to the fact that the matching of the compatible parts of the machine is not done well. Therefore, it is best to use the whole machine provided by a professional manufacturer, and do not assemble the hard disk recorder. Software and hardware are incompatible. Some monitoring software may not be able to start up or even be installed on some microcomputers. There may be software and hardware compatibility issues. Sometimes the settings of the sound card or video card conflict, causing an exception error. In addition, conflicts with interrupts, dma, or ports on other devices may cause a few driver exceptions to crash. The solution is to start in "safe mode" and make appropriate adjustments in "Control Panel" → "System" → "Device Management". For situations in which unusual errors occur in the driver, you can modify the registry. Select "Run", type "regedit", enter the registry editor, find and delete all "primary key" and "key value" related to the driver prefix string through menu "Find" function, restart.

Nine, caused by improper use of spare parts

When a few people assembled DVRs for their customers, they used inferior motherboards and memory, and some even sold counterfeit motherboards and old CPUs and memory. This would make the machine unstable during operation and the crash would be inevitable. . The larger the memory capacity, the better, at least 0,5% to 1% of the hard disk capacity. If this problem arises, you should replace the memory with the largest possible capacity. Or add a new memory module to the original memory. Since cpu overclocking increases the operating frequency of the CPU, it may also destabilize its performance. The reason is that the speed at which CPUs access data in memory is faster than the speed at which data is exchanged between memory and the hard disk. Overclocking has made this contradiction even more pronounced and has exacerbated the situation where the required data cannot be found in memory or virtual memory. This will cause an "abnormal error." The solution is simpler. It is to get the CPU back to normal frequency. In addition, for motherboards that do not support udma66/100, you should pay attention to the setting of the hard disk operating mode in cmos.

X. The crash caused by software

In addition to some of the hardware issues mentioned above, many of the hardware video recorder crashes are caused by software. Such as:

1, virus infection

Viruses are a major cause of computer operations and almost everyone is evil. Viruses can cause a drastic drop in computer productivity, causing frequent crashes, data loss, system crashes, and even damage to motherboards, hard disks, CPUs, and so on. Therefore, we must use anti-virus software such as kv3000, Rising and other excellent anti-virus software to conduct a comprehensive virus inspection and anti-virus on the computer when discovering a virus, and timely update the anti-virus software.

2. Improper setting of cmos

This fault is very common. For example, hard disk parameter settings, mode settings, improper memory parameter settings, etc., can cause the computer to fail to boot. If you set the memory without the ecc function to have the ecc function, it will cause a crash due to a memory error.

3, the initialization file is destroyed

Because windows starts to read system, ini, win, ini and registry files, if there are config, sys, autoexec, bat files, these two files will be read. As long as there are error messages in these files, they may crash, especially the four files of system, ini, win, ini, user, dat, system, and dat are particularly important.

4, the dynamic link library file (, dll) is missing

There is also a class of files in the windows operating system is also very important, this is the dynamic link library file extension, dll, these files belong to the shared class file in nature, that is, a, dll file may be more The software needs to call it at runtime. If we delete an application, the software's anti-installer will record the files it once installed and prepare to delete them one by one. At this time, the deleted dynamic link library file will be prone to be deleted. In the case of software, if the missing link library file is the more important core link file, the system will crash or even crash. At this time, we can use tool software such as "Super Rabbit" to delete unwanted dll files, which will avoid accidental deletion.

5, the hard disk space is too little or too much debris

Since some applications require large memory and hard disk space, if the free space of the hard disk is too small, virtual memory needs to be used when these applications require a large amount of memory and there is not enough memory on the machine, and virtual memory is used. Is provided by the hard disk, so the hard disk should have enough free space to meet the needs of virtual memory. Therefore, we have to configure a large hard disk when we are equipped with a computer. In addition, we must also develop a good habit of regularly arranging hard disks and removing junk files from hard disks. This will not only avoid crashes due to insufficient spare space or too much debris in the hard disk, but also increase the speed of normal operations.

6, bios failed to upgrade

The operator should back up the bios in case of accidental, but if the computer system needs to upgrade the bios, then it is better to determine whether the bios version you are using matches your pc before upgrading. If the bios is not upgraded correctly or an unexpected power failure occurs during the upgrade, the computer system may fail to start. So before you upgrade bios, you must figure out the bios model. If you use the bios upgrade tool to backup the current bios, you should copy the previous bios on disk. At the same time see whether the system supports bios recovery and how to recover.

7, improper software upgrade

Most people may think that the software upgrade will not be a problem. In fact, some of the shared components will also be upgraded during the upgrade process. However, when other programs may not support the upgraded components, they will have various problems. Caused a crash. Therefore, when you upgrade the software, you must also pay attention to the operation, first understand the characteristics of the upgraded software, performance, and possible troubleshooting methods and then upgrade.

8, abuse test software

At present, there are many operating software on the market for some beta software to check the reliability and stability of its software, so that it can be properly improved when it is officially published. Therefore, the testing software usually has some bugs or is not stable enough in some respects. No version of the software can be considered fully mature software. Therefore, when we are not very expert on the computer, it is best to use less software test version, so as to avoid data loss after the use of program errors, crashes, or the system can not start and other failures, to bring unnecessary trouble to their own .

9, illegally uninstall software

Because computers now run a lot of software, people always like to download, install, and uninstall software frequently. This is not good. Do not delete the directory where the software is installed. If you delete it directly, there will be a lot of garbage in the registry and windows directory. As time goes by, the system will become unstable and cause crashes. Therefore, do not download and install software that is not necessarily needed.

10. Use pirated software

There are so many pirated softwares nowadays. Almost all softwares are pirated. Because these pirated software may hide viruses, once executed, it will automatically modify your system and cause the system to crash in operation. However, if genuine software is used, I am afraid it is not realistic. Therefore, it is only possible to use as little pirated software as possible. In particular, software that is not commonly used and software that is not expensive are not required to use pirated software.

11, application software defects

This situation is common, such as running 16-bit applications that run well in dos or windows 3 and 1 in win98. Win98 is 32-bit, and although it claims to be compatible, there are many places that cannot be coordinated with 16-bit applications.

12, too many programs started

If too many programs are started, the system resources will be exhausted. If the data required by individual programs cannot be found in the memory or virtual memory, an abnormal error will occur and the system will crash. Therefore, it is recommended that the startup procedure be less.

13, illegal operation

Opening or releasing the program illegally with an illegal format or parameter can also cause the computer to freeze. Please note that to keep in mind the correct format and related parameters, do not open and release unfamiliar programs at will.

14, abnormal shut down the computer

Now pc-type hard disk recorders are mostly equipped with windows system, therefore, we do not directly use the power button in the chassis when shutting down, otherwise it will cause system files to be damaged or lost, causing auto start or running in the crash. For windows98/2000/nt and other systems, this is very important, if serious, it will cause the system to crash. Therefore, for pc-type hard disk recorders shut down, unless the pc-type hard disk recorder crashes and can not program shutdown, usually must use the computer's "close the system" button to shut down properly.

15, memory conflict

Sometimes pc-type hard disk recorders are normal when running various software, but it suddenly crashes inexplicably, but it is normal to run these applications after restarting. This is actually a phenomenon of false death. Most of the reasons for this are due to memory resource conflicts in win98. As we all know, application software runs in memory, and when you close application software, you can free up memory space. However, due to the design reason, some application software cannot completely release the memory even after it is shut down. When the next software needs to use this memory address, it will cause a crash.

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