Computer Emergency troubleshooting

 

 

When using computers, friends may encounter many unexpected faults, which may be caused by software or hardware faults, or other factors ...... So, how should we be able to cope with these incidents for Junior computer users? See the following:
Power failure
　　
Phenomenon: displays, hosts, speakers, etc. will be "forced off" in an instant ".
Symptom Analysis: this is caused by a sudden "power failure. Voltage fluctuations generated by the moment of power failure impact computer hardware chips, circuits, resistors, etc. If you are performing disk read/write operations when a power failure occurs, a bad track may occur, or when you are writing a document, data will be lost ......
A proper strategy: select a brand of power supply for computer configuration, so as to minimize the adverse effects of voltage fluctuation on hardware. After a power outage, 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. This will cause adverse hardware damage. When you use word to edit a document, use the automatic saving function of word. If you operate the disk exactly when the power is down, we recommend that you do not skip disk detection during the next boot to check whether a bad track is generated. Once a bad track is discovered, use tools such as Norton and pqmagic to repair or shield the bad track. In addition, if you are financially authorized, we recommend that you select a UPS instance to provide power-off protection for your computer for a period of time.
Automatic shutdown
Symptom: The system is automatically shut down or restarted when the computer is running normally.
Symptom Analysis: The current motherboard has the CPU temperature monitoring function, once the CPU temperature is too high, exceeds the temperature set in the motherboard BIOS, the motherboard will automatically cut off the power supply to protect the relevant hardware. On the other hand, power management and virus software in the system can also lead to this phenomenon.
Suggestion: if the above sudden shutdown occurs, first confirm whether the CPU cooling is normal. Enable the chassis to visually check whether the fan blade works normally, and then enter the BIOS option to check the fan speed and CPU operating temperature. If a fan problem is found, perform related Dust Removal maintenance on the fan or change the fan with better quality. If you want to eliminate the hardware cause, go to the system and choose "kiss to death" from the installation disc to overwrite the Installation Power Management, and then thoroughly detect and eliminate the virus. When these factors are eliminated, the fault may be caused by the aging or damage of the power supply. This can be confirmed by replacing the power supply method. If the power supply breaks down, it will change to a new one. Do not continue to use it, hardware will be burned out.
System host
Symptom: The desktop is locked and the mouse cannot be moved. In severe cases, hot boot (Alt + Ctrl + DEL) fails. There is also the blue screen phenomenon.
Symptom Analysis: the cause of this fault is the bug of the "kiss to death" System and the compatibility problem between various software. It may also be that the user has run too many large programs at the same time, as a result, the process is blocked and the machine is triggered.
Countermeasure: when the host is divided into two types: true and false, the easiest way to distinguish between the two is to press the numlock key in the keypad to check whether the indicator lights have changed. Yes, it is false; otherwise, it is true. If you can press Alt + Ctrl + DEL at the same time and select the program name in the displayed task list, then Mark the items with no response, and click end task. Really, only cold start. For the blue screen, after pressing the ESC key is invalid, Select Restart and press the reset key on the chassis panel. For compatibility issues, you can uninstall the "problem" software and update the motherboard BIOS and related motherboard drivers.
Virus attack
Symptoms ......
Symptom Analysis: virus is essentially a malicious computer program code. The virus uses a large number of copies and runs in the system, occupying system resources, serious damage to software and hardware, such as CIH and hard disk locks.
Solution: the virus uses anti-virus software. If you suspect that your machine is infected with a virus, restart the system to DoS and run the genuine anti-virus software (DOS version) to kill the virus that cannot be killed by "kiss to death; then, start the system desktop and run the Windows version of anti-virus software for anti-virus. On the other hand, some files may be damaged due to a severe virus attack. Before the virus attack, we back up important files to other drives except drive C and set the attribute of the data file to read-only. At the same time, you need to update the antivirus software virus database and use less pirated discs. Those who have already accessed the Internet do not need to download emails from unknown attachments.
System Faults
Symptom: unable to enter the system. The typical manifestation is that the system passes the self-check upon startup, stops at the startup screen, or displays many prompts such as the disk is error.
Symptom Analysis: this is a system fault, which may be caused by many reasons. A common problem is that the system file is modified, damaged, or an abnormal command line is loaded. In addition, hard disk failure is also one of the reasons.
Countermeasure: First, you must try to enter safe mode. Press F8 at startup and select the third item in the menu: Safe Model (safe mode ). After entering the safe mode, you can use the Device Manager and System File Checker to find the fault. You can identify the current body and determine whether del or set interruption. You can also reinstall the driver. If the system file is damaged, it can be recovered from the installation file (we recommend that you copy the Windows installation disk to the hard disk in advance ). If you cannot connect to the secure mode, you can use a boot disc or a floppy disk to boot to dos. in DOS, the system files in drive C are completely disinfected and Dir is used to check whether the system files in drive C are complete, if necessary, use the system floppy disk to perform sys C: to restore the relevant basic system files. If no file is found in drive C, you must reinstall the system.
Driver loss
Symptom: the device is displayed in 16 colors when it is started, and the device "XXX" is in use when the audio file is stored.
Symptom Analysis: after eliminating the cause of the virus, this phenomenon often occurs on an old machine that has been used for N months, or when the user has recently moved the components in the host (such as the video card and PCI Card ), this may cause poor contact with the hardware, and the system does not thoroughly detect the relevant hardware.
Solution: reinstall the driver of the video card and check whether the related accessories are in full contact with the motherboard. First, ensure that the Gold finger of the video card and sound card are cleaned, the second is to insert it into the relevant slot when the appropriate force, aligned with the vertical insertion, and then connected to the sound box with the display line. If necessary, you can change the slot location of the PCI Card to avoid resource conflicts with the video card.
Black screen
Symptom: The black screen is not displayed, and an alarm may sound.
Symptom Analysis: poor contact between hardware, or hardware failure. The related hardware involves memory, graphics card, CPU, motherboard, power supply, etc. When a computer is powered on, it must first be powered by a power supply, and then self-checked by the BIOS of the motherboard, and then through the CPU, memory, and graphics card. This process is reflected in the screen called self-check. First, the BIOS information of the video card, then the motherboard information, and then the memory, hard disk, and optical drive. If something goes wrong in the middle, the computer will not be able to start normally, or even a black screen.
Countermeasure: First, check whether the external connections and internal connections are smooth. External connections include displays and host power supply. There is a connection between the host power supply and the host Power Supply interface (sometimes poor contact ). The common cause is that the memory of the video card is exposed to dust in the air for a long time due to the usage of the memory. As a result, the oxide layer on the golden finger causes poor contact. In this regard, use cotton to stick a moderate amount of alcohol to wipe the Gold finger back and forth, wait for the dry and insert back. In addition, check whether the CPU is working normally. After the instance is started for about half a minute, manually touch the CPU fan's heat sink to see if the temperature exists. If there is a temperature, the possibility of CPU failure can be basically ruled out. If there is no temperature, sort out the CPU outlet to ensure that the contact is in place. After that, your CPU can be upgraded: (in addition to the above method, there is also a killer: remove the BIOS settings or replace the motherboard CMOS battery using the jumper method. When all these methods have been tried and all fail, you can summon the Great shrimp brother to help you.
Noisy odor
Phenomenon: You can hear a strange noise or smell a bad smell.
Symptom Analysis: Strange noise may be caused by bad sectors of the hard disk (harsh sound of grid); it may also be the hard disk, the drive screw is not firmly mounted, resulting in the resonance of the chassis. Nose, mostly burnt, very pungent.
Countermeasure: first turn off the power supply. If it sounds strange, open the chassis panel and check it one by one. If it is a bad track, repair or shield it. Be careful with the odor. At this time, you can smell it with your nose, find the component that emits an odor, and then unload it to the computer company for processing. In the middle, you must protect your consumer rights. (If the warranty period is not passed, replace the replacement and repair the repair .) You must never mind this! Because the author's angda optical drive is unable to burn the firewall driver chip to the active drive after the power failure (slow for n seconds), and then he can no longer get the money to find Uncle Js. (If you smell the smell, immediately cut off the power supply, and then open the chassis to find the reason, but do not open the display, can only be handed over to professional repair, it is highly piezoelectric, never joke with your own life