Many users often encounter such a situation when using a computer - attempting to close Windows, the computer does not respond or appears with a blank screen such as a flashing cursor. How to solve this type of failure? Shutdown process and failure Cause Windows shutdown program will perform the following functions during shutdown: Complete all disk write operations - Clear Disk Cache - Perform closing window programs to close all currently running programs - all protected patterns Driver conversion is real mode. The main reason for disabling fast shutdown caused the Windows system has a shutdown failure: the sound file is corrupted when the selected exit Windows; incorrect configuration or damage the hardware; the setting of the BIOS configuration is incompatible; "Advanced Power Management" in the BIOS Advanced Configuration and Power Interface "is not appropriate; no video card is assigned to the video card in real mode; a program or TSR program may not be properly closed; load an incompatible, damaged or conflict-driver driver and many more. Fault Analysis and Solution 1. Sound file when exiting Windows, you can determine if the "exit Windows" sound file is destroyed - open "Control Panel", open "Sound", cancel the "Exit Windows" sound. If Windows is turned off normally, the problem is caused by exiting the sound file. To resolve this problem, you can resume the sound file from the backup or reinstall the programs that provide sound files, or the "exit Windows" is silent. 2. Quick shutdown is not normal to quickly shut down new features in Windows 98, which can greatly reduce shutdown time, but this feature is not compatible with some hardware, which may cause the computer to stop responding. You can run "MSConfig" and disable fast shutdown in the Advanced option. If the computer is turned off normally, the hardware device is not compatible. 3. Note "Advanced Power Management" This "Advanced Power Management (APM)" function on your computer can also cause shutdown or black screen issues. To determine if the APM can cause shutdown issues, open "Device Manager" to open "System Device". Cancel the "Enable Power Management" selection in Advanced Power Management. If the computer is turned off normally, the problem may be APM. 4. Starting, shutting down, everyone often encounters when Windows just started, "You can safely turn off your computer", or turn it off immediately or shut down when you start. This type of failure is generally caused by damage to Wininit.exe or VMM32.vxd file. The solution is to renew these two files from the Windows installer compression package. Put it in a WindowsSystem subdirectory, rename the VMM32.vxd to VMM32.xxx for backup, then open System Tools, select "System Information" - System File Inspector in "Tool", select "From the installation disk Extract a file, enter "Wininit.exe" or "VMM32.VXD". Repeat this step to replace file Wininit.exe or VMM32.vxd. 4.Config.sys or autoexec.bat There is a problem to extract a file from the installation disk. In addition, you can check if there is a conflict in the config.sys file or the autoexec.bat file. Use the text editor to view the contents of these two files, see if there are excess commands, or use "remote" to prohibit the execution of some statements, gradually exclude until conflicting commands.
5. Check the CMOS settings CMOS settings will also cause computer shutdown issues. You can enter the CMOS settings page when the computer starts, and you can check the FOPU out-of-band, power management, virus detection, IRQ interrupt opening, disk start order, etc. Whether the option setting is correct. Confirmation Method You can see your motherboard manual, which has a very detailed setting instructions, if you set it really don't understand it, I suggest you use the factory factory default settings. Computer Network March 19, 2006 19:48:53 Comments (0) Reference Notice (0) Push to Circle
Power supply maintenance and its fault performance
The computer's power supply is the power source of motherboard, CPU, hard disk, memory, etc., without power computer, it is not possible. The main unit switching power supply is high, the accurate and output voltage is accurate, the quality of the output current is high, and it is related to whether the computer can work normally, whether it can run for a long time. So when we installed the machine yourself, we must not save a few dollars, buy a cheap power supply, causing the system to unstable or have some strange failures in future work, and may also cause serious losses such as motherboard, hard disk or CPU damage. The use and maintenance of the power supply 1. When the computer is in use, a certain space should be retained for the host, so that the air is smooth, so that the heat generated during the operation of the host can be scattered normally. At the same time, the dust cover must be removed when the host is working. If the host is working at work, discover the fan of the power supply to stop working, it must be turned off immediately to prevent the power supply from burning or even cause more than other bigger losses. 2. Switching power supply At the moment of power-on, there will be a lot of surge current, which is easy to cause damage to components. So when we shut down, it is best to wait 3-5 minutes to turn the second boot. 3. In order to protect your computer to work normally, you should regularly check if the fan is working properly, usually 3-6 months. Because if the fan is stopped or the speed is slow, the temperature of the power supply or the temperature of the chassis and the temperature of the CPU, the North Bridge, and the graphics card will rise, resulting in a frequent crash or restart of the system, and cannot work properly. If possible, when we buy a replacement fan, it is best to buy an industrial standard ball bearing fan instead of buying a general oil-containing bearing fan, which ensures that your computer has no fault stability. 4. When the power is used, it is best to open the power supply, clear the dust inside the power supply, and refueling the power fan. The power supply is working for a long time, because the air flow will have a lot of dust accumulation in the power supply, resulting in poor heat dissipation. At the same time, there is too much dust, and it will also cause a circuit short circuit in a humid environment. So for the normal and stable operation of the system, the computer should take regular dust. Power supply problems: 1. Hard disk loss computers will have no regular hard drives in the process, causing the system to find the hard drive while the system is not found. Or can you find a hard drive when your computer is started, sometimes you can't find a hard drive. If this happens, it is best to check whether the 12V and 5V output of the switching power supply is normal and puts the data backup in time. 2. This situation is mainly because the output part of the switching power supply is not good, and the capacitance capacity is lowered for a long time, the ripple coefficient in the output DC power supply is too large, and the normal operation of the host is interfered. The system crash or blue screen is caused. This problem is highlighted by some of the power supplies in the Century Star. 3. If the power is powered off, this is generally the logic judgment circuit in the internal supply of the power supply is unstable. The typical performance is if the power switch is pressed normally, and the system can start now start. If the system is working or unplugged after work, then press the power switch, the host does not respond, you must wait a few minutes to start. 4. This is generally insufficient power supply, and the output power is too small. Typical manifestations After placing an optical disc, the optical disk begins to restart as long as the start is high-speed. The system configuration of the main board of the ATX structure is the core system configuration. The minimum power supply required is 145W, the greater the power supply that the peripheral components need. 5VSB standby power needs to provide 720mA current. If the ATX power supply does not provide enough current, it is possible that the computer cannot be turned on normally. If the power supply is insufficient, it is often caused by power protection and stops working for a long time. If you use AMD's CPU, then you'd better use a power supply that meets the AMD recommendation standard.
5. It is possible to have an ATX power source when the ATX power is executed, generates an incorrect pulse signal. 6. The inexplicably automatic boot is mainly the manufacturer of switching power supplies to reduce production costs, saving the filter circuit of the switching power input portion, causing the interference pulse to enter the host, causing an error. 7. The power supply "wow" has been alarm after power on the power on the power, but the computer can start normally, and the display also has image display. This is generally that the motherboard has an overvoltage alarm function, and a voltage of the computer power output is abnormal, too high or too low. 8. After restarting, the host is restarted. After the blue sky is white, when it is ready to enter the desktop, the crash is generated. 9. The hard disk light flashes, and after the power switch cannot be started, the power indicator of the host, the hard disk light is ruined, and it cannot be started normally. 10. The system newspaper card or memory is incorrect or memory error after boot graphics card or internal memory. 11. Drop the graphics driver or blue screen system can pass the self-test, but often drop the graphics card, or often enter the security mode, or often blue screen phenomenon. The power supply test acts as a power source of PC power and changes with the progress of the PC. From the previous 100W AT power supply to today 450W and even higher ATX power supplies, not only the power continuously climb, the output current is increasing, and the output current of 5V has exceeded 30 amps. Since I announced the ATX2.01 power standard in January 1998, the power supplies produced later is compatible with this standard, but the output current of each voltage is increasing. We use the ATX switching power supply, and the output voltage has several different voltages such as 12V, -12V, 5V, -5V, 3.3V. Under normal circumstances, the output variation range of the above-mentioned voltage allows errors typically within 5%, as shown in the following table, does not have too much fluctuations, otherwise it is easy to show the data loss of the dead machine. Standard voltage value wire color minimum voltage value maximum voltage value 5V red 4.75 5.25 -5 V Yue 11.4.6 -12V Blue-11.4 -12.6 3.3V Orange 3.135 3.465 Masterboard Power Pack ATX Power Power Output Interface ATX power 20-pin output voltage and function definition table pin name color Description 1 3.3V Orange 3.3 VDC 2 3.3V Orange 3.3 VDC 3 COM Black Ground 4 5V Red 5 VDC 5 COM Black GROUND 6 5V Red 5 VDC 7 COM Black Ground 8 PWR_OK Gray Power OK ( 5V & 3.3V IS OK) 9 5VSB Purple 5 VDC Standby Voltage (MAX 10mA) 10 12V Yellow 12 VDC 11 3.3V Orange 3.3 VDC 12 -12V Blue-12 VDC 13 COM Blue Ground 14 / PS_ON Green Power Supply On (Active Low) 15 COM Black Ground 16 COM Black Ground 17 COM Black Ground 18 -5 V White-5 VDC 19 5V Red 5 VDC 20V Red 5 VDC Test Method: In order to facilitate test reading, we use digital multimeter 20V DC files to test. Prepare a 10 ohm 10W resistance, pick it up on the voltage output of the test, and then test the voltage output at this time using the multimeter.
Because when the switch is available for average, some power supplies may be protected, stop the work; it is also because the load is too light, the output voltage may be high. This power source will not be used if the output voltage of a certain road is very large, and this power will not be used and must be replaced. What kind of case occurs if these voltages are low or high? 1. 12V 12V is typically a hard disk, optical drive, a spindle motor, and a counter motor, and a circuit logic signal level such as working voltage and serial port for ISA slots. If the voltage output of 12V is abnormal, the hard disk, the optical drive, and the floppy drive is often unstable. When the voltage is low, it is manifested as being severe, and the logical bad track of the hard disk is increased, and there is often a bad track, and the system is easy to crash, and it is not possible to use. When the high is high, the speed of the optical drive is too high, and it is easy to have an out-of control phenomenon. It is more prone to exploded phenomena, and the hard disk is stall and flying. The voltage of-12V-12V is to provide a logical judgment level for the serial port. It requires a small current, generally below 1 amps, even if the voltage deviation is large, it does not malfunction, because the logic level is 0 levels - 3 to -15V, have a wide range. 3. 5V 5V Power is provided to the operating voltage of integrated circuits such as CPU and PCI, AGP, ISA, which is the main operating power supply. Its power quality is good and directly related to the computer's system stability. Most AMD's CPU 5V output current is greater than 18A, and the current of the latest P4CPU is at least 20A. In addition, the 5VSB of the machine required by the AMD and P4 is at least 720 mA or more, where the P4 system computer needs to be at least 230W. If there is not enough 5V voltage to be provided, the CPU operating speed is slow, often blue screen, screen image pause, etc., the work of the computer is very unstable or unreliable. 4. -5V -5V is also the level of judgment to logic circuits, and the current needs is small, and generally does not affect the normal operation of the system, and there is a small faulty. 5. 3.3V This is a special setting for the ATX power supply to provide a power supply for memory. The voltage is strict, the output is stable, the ripple coefficient is small, the output current is large, and 20 amps is more than 20. Most motherboards are used to reduce the power to the memory slot when using SDRAM memory. Some medium and high-grade motherboards use high-power field management memory power supply for security, but will also burn this pipe due to memory insertion. If the motherboard is used by 2.5V DDR memory, the voltage conversion circuit is installed on the motherboard. If the voltage is too low, it behaves as an easy to crash or regularly reported an error, or the Win98 system prompts the registry error, or the operating system is not installed. 6. 5VSB ( 5V standby power) ATX power supply supplies 5V 720mA power to the motherboard through PIN9, which provides power supplies for WOL (Wake-Up On LAN) and powered circuits, USB interfaces. If you don't use network wake-up, turn this class, jumper removal, avoid these devices from 5VSB power supply to the current. 7.P-ON P-ON (PIN14 pin) is a power switch control terminal that determines the operating state of the main power of the switching power source by determining the level signal of the port.
