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1. Encounter power failure

Phenomenon: Display, host, slightly etc. will be "forced off" in an instant.

phenomenon analysis: this was caused by a sudden "power failure." The voltage fluctuation generated by the moment of power failure will impact the chips, circuits, resistors, etc. of computer hardware. Once you are reading and writing disk operations when the power failure, it is possible to produce bad track, or when you are writing documents, the data will be lost...

Should be the policy: with a computer when the selection of a brand power supply, so that the maximum from the power supply to reduce the adverse effects of voltage fluctuations on hardware. After power failure, turn off all power supplies to prevent the display and some ATX power supplies from starting at the same time when the next call is made, which will cause adverse damage to the hardware. When you edit a document in WORD, use WORD's auto-save feature. If you are operating on the disk at the moment of power failure, it is recommended that you do not skip disk detection at startup next time and detect whether there is bad track. Once bad track is found, NORTON, PQMAGIC and other tools and software can be used to repair or shield bad track. In addition, if you can afford it, it is recommended to choose a UPS to provide power failure protection for a period of time.

2, automatic shutdown

Phenomenon: The computer automatically shuts down or restarts the system during normal operation.

Phenomenon analysis: Today's motherboard has a temperature monitoring function for the CPU. Once the CPU temperature is too high and exceeds the temperature set in the BIOS of the motherboard, the motherboard will automatically cut off the power supply to protect the related hardware. On the other hand, power management and virus software in the system can also cause this phenomenon to occur.

If the above sudden shutdown phenomenon has been occurring, first confirm whether the CPU heat dissipation is normal. Open the chassis and visually inspect whether the fan blades are working properly, and then enter the BIOS option to see the fan speed and CPU operating temperature. If the problem is found to be a fan, the fan will be subject to dust removal maintenance or replacement with a better quality fan. If you rule out hardware reasons, enter the system, install power management from the "Kiss to Death" installation CD, and then thoroughly kill the virus. When these factors are eliminated, the cause of the failure may be power aging or damage, which can be confirmed by replacing the power supply method, the power supply is broken and replaced with a new one, must not continue to use, will burn hardware.

3. System downtime

Phenomenon: Desktop is locked, mouse can not move, even hot start (ALT+CTRL+DEL) is not serious. There is also the blue screen phenomenon.

Phenomenon analysis: BUG of Windows system itself and compatibility problem between software is the cause of the failure, it may also be that the user runs too many large programs at the same time, which leads to process blocking and causes crash.

The easiest way to tell the difference is to press the Numlock key in the keypad area and observe whether the indicator light changes. Yes, it is false; otherwise, it is true. If you can press ALT+CTRL+DEL at the same time, mark the item that has no response after selecting the program name in the task list that appears, and click End Task. Really, only cold starts. For blue screen, after pressing ESC key is invalid, select Restart and press Reset key on chassis panel. Compatibility issues can be resolved by uninstalling the "problem" software and updating the motherboard BIOS and associated motherboard drivers.

4. Virus outbreak

Phenomena: System runs slowly, crashes, illegal operations, hard disk lights flash, often blue screen, and inexplicable system prompts…

Phenomenon analysis: Viruses are essentially malicious computer program codes. Viruses replicate themselves in large numbers and run secretly in the system, occupying system resources, and seriously damaging software and hardware, such as CIH, hard disk locks, etc.

Countermeasures: a foot high, a foot low magic, virus nemesis is antivirus software. Once you suspect that your machine is infected with viruses, please restart the system to DOS, run genuine antivirus software (DOS version) so that you can kill viruses that cannot be killed under "Kiss to Death"; then start to the system desktop and run the WINDOWS version of antivirus software for re-disinfection. On the other hand, because the virus attacks severely, some files will be destroyed; we will back up important files to other drives other than C disk before the virus attacks, and set the attributes of data files to read-only. At the same time, we should always update antivirus software virus library, less pirated discs, friends have been online to unknown mail attachments do not download.

5. System failure

Phenomenon: Cannot enter the system, typical performance is boot self-test pass, stop at the startup screen, or display:The disk is error and many other phenomena with English prompts.

Phenomenon analysis: This is a system failure, which can be caused by many reasons, the more common is that the system file is modified, destroyed, or loaded with an abnormal command line. In addition, the failure of the hard disk is also one of the reasons.

Countermeasures: First of all, try whether to enter the safe mode, power on press the F8 key, select the third item in the startup menu:Safe model(safe mode). After entering safe mode, you can find faults through device manager and system file inspector, and encounter "! "The number can be ascertained by identifying the true body and then determining whether to del or set the interrupt. You can also reinstall the driver, and the damaged system files can be restored from the installation file (it is recommended to copy the WINDOWS installation disk in advance). If you can't even enter the safe mode, you can boot to DOS through a CD or floppy disk with a boot. Under DOS, first disinfect and check whether the system files in the C disk are complete with Dir. If necessary, you can carry out Sys C: through the system floppy disk to restore the relevant basic system files. If no files are found in drive C, only a thorough reinstallation of the system is required.

6. Loss of drive

Phenomenon: 16 color display when booting, display "XXX" when playing audio files, equipment is occupied.

Phenomenon analysis: After excluding the cause of the virus, this phenomenon mostly occurs on the old machine that has been used for N months, or the user has recently moved the components in the host,(such as graphics cards and PCI cards), which may cause poor contact of the hardware, resulting in the system not completely detecting the relevant hardware.

Countermeasures: reinstall the driver of the graphics card, and check whether the relevant accessories are in complete contact with the motherboard: one is to ensure that the graphics card, sound card gold finger clean, the other is to insert it into the relevant slot with appropriate force, aligned vertical insertion can be, and then connected with the matching slightly and monitor cable. If necessary, you can replace the slot position of PCI card to avoid resource conflict with graphics card.

7, boot black screen

Phenomenon: black screen, no display, there may be an alarm sound.

Phenomenon analysis: poor contact between hardware, or hardware failure, related hardware related to memory, graphics, CPU, motherboard, power supply, etc. Computer boot through the power supply, and then by the motherboard BIOS boot self-test, and then through the CPU, memory, graphics, etc. This process is reflected on the screen called self-test, first through the graphics card BIOS information, then the motherboard information, then memory, hard disk, optical drive and so on. If there is a problem in the middle, the computer will not start normally, or even black screen.

Countermeasures: First of all, confirm whether the external connection and internal connection are smooth. External wiring has a display, host power supply, etc. There is a host power supply and host power interface wiring (sometimes poor contact here). The more common reasons are: graphics card, memory due to long use time, long-term contact with dust in the air, resulting in an oxide layer on the gold finger, resulting in poor contact. To this end, stick a moderate amount of alcohol on cotton and wipe the golden finger back and forth, and insert it back after drying. In addition, observe whether the CPU is working normally, boot for about half a minute, and touch the CPU fan's heat sink with your hand to see if there is temperature. With temperature, the possibility of CPU failure can be basically ruled out. If there is no temperature, tidy up the CPU socket to ensure that the contact is in place. After this, your CPU can be upgraded without temperature:(In addition to the above method, there is also a killer skill: clear the BIOS settings by pulling the jumper or replace the CMOS battery of the motherboard.

8, strange smell

Symptoms: hearing strange sounds or smelling odors.

Phenomenon analysis: strange sound, may be due to the hard disk bad track caused by the hard disk (grating sound); it may also be hard disk, drive screws are not on the firm, causing the resonance of the chassis. Odor, mostly burnt smell, very sharp nose kind.

Solution: Turn off the power first. If it is strange, open the cabinet panel and check one by one. If it is bad, repair or shield it. Be careful with odors. Sniff your nose, find the odorous part, and unload it for the computer company to dispose of. In the meantime, everyone must defend their consumer rights. (Those that have not passed the warranty period--those that should be replaced and those that should be repaired.) This must not be careless.

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