主机开不起来（The main engine doesn´t work）

主机开不起来（The main engine doesn´t work） 主机开不起来(The main engine doesn't work) Note: ordinary users please do not open the monitor back cover for maintenance. There is high voltage electricity in it. If the motherboard hard disk indicator light is long or dark, the focus of the inspection should be on the host. You can try to memory, graphics cards, hard drives and other accessories one by one plug and play to confirm the source of failure. If after all the test, the computer failure is still not resolved, you can only send to the maintenance station. The default is CPU or physical damage to the motherboard. Three of common computer failures - boot no response (next) Here we will analyze the "press the boot button, CPU fan does not turn" the cause of the failure. This kind of fault can be said to be the most difficult to handle, especially in the absence of any specialized equipment. The author can only give some feasible test steps according to the past maintenance experience. Please note that each of the following steps is the actual failure case I have seen. Computer host, a big killer - dust 1, check the power and restart the button is not out of physical failure, the most common is to press down, do not come, the two keys of any such problems, can cause the computer can not boot properly. The solution can only repair or replace the case, because the case due to the integrated inside the box, the average user is difficult to repair. 2, open the case, unplug the motherboard BIOS power, wait a moment, and then press again to see if the computer can work properly. 3, the motherboard and chassis link line all off, use a screwdriver to touch the motherboard power control pin (confirmed with a lot of needle, needle power control refer to the motherboard manual, don't touch, burning the motherboard), if the normal boot, boot and restart the chassis proved to be key issues. The solution is the same as above. 4, the power supply and the motherboard, hard disk, floppy drive, CD-ROM equipment between the data and the power line all unplug the motherboard backplane all devices, such as display, cable, mouse and keyboard are all removed, dust dry board power supply socket and the power plug after re inserted, boot. If you can boot, then insert the device one by one to confirm the source of the fault. After the confirmation, update the faulty parts to solve the problem. The above four steps are all tried, and still can not determine the source of failure, then, in the case of equipment now, has been unable to determine the source of failure, the computer can only be sent to the maintenance station. The estimated fault is: power or motherboard burned down. AMI BIOS 1 short: the memory refresh failed. Change memory bar. 2 short: instructions memory ECC than error. In CMOS, the option for memory ECC verification is set to Disabled or to replace memory. 3 short: the system basic memory check failed. Swap memory. 4 short: indicating system clock error. Replace chips or CMOS batteries. 5 short: indicate CPU error. Check if CPU is plugged in. 6 short: explain keyboard controller error. The main board should be checked. 7 short: the system real mode error, can not switch to protection mode. 8 short: instructions for memory errors. Show memory problems, try replacing video cards. 9 short: explain BIOS chip inspection and error. 1 long 3 short: indicate memory error. Memory corruption, replace. 1 long 8 short: instructions display test error. The monitor data line is not plugged in or the display card is not plugged in. Phenomenon four: the system can start, there are video, there is a fault prompt, then you can prompt to determine the location of the fault. Here are some common troubleshooting tips: First, prompt "CMOS Battery State Low"" Reason: CMOS parameters are missing, sometimes can be started, use a period of time after the crash, this phenomenon is mostly caused by insufficient CMOS power supply. Different measures are adopted for different CMOS power supply modes: 1. welded batteries: soldering a new battery with a soldering iron; 2. button batteries: direct replacement; 3. chip type: replace this chip, it is best to use the same type of chip replacement. If you replace the battery after the time is not long and the same phenomenon, it may be the motherboard leakage, can check on the motherboard or diode capacitor is damaged, can also use battery jumper, but all need to have some basis to complete hardware maintenance. Two, prompt "CMOS Checksum Failure"" BIOS test and reading errors in CMOS; "CMOS System Option Not Set tips, CMOS system is not set;" CMOS Display Type Mismatch "prompt, CMOS display settings and the measured type is not consistent; that" CMOS Memory Size Mismatch ", the main memory and the CMOS on the motherboard installed in different tip;" CMOS Time & Date Not Set ", the time and date in CMOS is not set. All this needs to be reset to CMOS. Three, prompt "Keyboard Interface Error" after the crash The reason: the motherboard keyboard interface cannot use, unplug the keyboard, and then re insert the system can start normally, after a period of time the keyboard does not respond, this phenomenon is mainly caused by the multiple keyboard keyboard interface board plug loose, remove the motherboard with an electric iron welding is good; it may be charged by keyboard. An insurance board broke resistance (marked Fn things on the motherboard), put on a 1 ohm / 0.5 watt resistor. Four 、 the self-test process is interrupted at xxxK Cache This indicates that the Cache on the motherboard is corrupted and can be excluded by setting the External Cache item as "Disable" in the CMOS setting. Similarly, in the self-test motherboard parts interrupt, you can think that the components damaged, the solution can generally be shielded in the CMOS, if you can not shield this component, it is best to replace the motherboard. Five, prompt "FDD Controller Failure"" BIOS cannot exchange information with the floppy drive; prompt HDD Controller Failure; BIOS cannot exchange information with the hard disk drive. Check the FDD (HDD) control card and cable. Six, prompt "8042 Gate A20 Error"" 8042 chip is broken; hint "DMA Error", DMA controller is bad. This kind of fault needs replacing. Seven, prompt "Display Switch Not Proper"" The display mode jumper on the motherboard is set incorrectly, re jumper. Eight, prompt "Keyboard, is, Lock... Unlock it"" The keyboard is locked, the lock is unlocked, and the system is rebooted. Nine, IDE interface device detection information is: "Detecting, Primary (or Secondary), Master (or Slave)... None"" Indicates that the IDE interface has not found the hard disk. If the IDE port does have a hard disk, the hard disk is not connected or the hard disk is defective. You can check it from the following aspects: 1, hard disk power line and data cable is bad contact, or change a line try; 2, CMOS settings error, enter CMOS, "Primary Master", "Primary Slave", "Secondary Master" three items of "TYPE" are set to "Auto""; 3, the replacement method to confirm the hard disk itself is faulty. Ten, IDE interface device detection information, below shows "Floppy disk (s) fail (40)" error information Indicates the problem with the floppy disk drive specified by CMOS. The method of judgment and resolution is similar to that of hard disk. Phenomenon five: the system can not boot. This failure is generally not a serious problem, but in the system is used to guide the driver found not found in the boot file, for example: BIOS boot drive setting floppy disk drive in the front row, and the floppy drive and put no boot system floppy disk or BIOS boot driver setting CD-ROM in the front row hard disk drive, and CD-ROM and put no guide system for CD, this is very simple, will remove the CD or floppy disk can be met, "Disk Boot Failure Insert System Disk application, And Press Enter" message, most are for this reason. If the hard disk can not boot, there are generally two cases: one is the hard disk data line is not inserted, and the other is the hard disk data corruption. The former generally appear hard disk capacity detection is not correct and boot when the phenomenon of crashes; the latter is simply unable to find the boot file or prompt file damage. The former only needs to reconnect the data line; the latter needs to start with the Win98 startup floppy disk or the boot disk, according to the actual situation: A prompt "Invalid partition table", or "Not Found any [active partition] in HDD Disk Boot Failure, Insert System Disk And Press Enter", it can not find the hard disk partition on the hard disk activity, need to re partition. Two, prompt "Miss operation syste", indicating that the hard disk active partition needs to be re formatted (format, c:/s). Three, prompt "Invalid, system, disk, the, disk, and, then, any, key, Replace" or show "Starting Windows 98" press..." When the crash, the system files on the hard disk is lost or damaged, the use of "sys c:" command transfer system files to the C drive, then copy the Command.com to C. Phenomenon six: hard disk can boot, but Windows can not start properly, and can not enter the safe mode. This situation shows that Windows 98 has made serious mistakes, first of all, with anti-virus software to kill the virus, to see if the virus is caused, if not found in the virus, you can try the following methods. First, the interface card and peripheral devices are allocated directly, Plug in again and adjust the settings on the interface card (if possible) to check for hardware conflicts and boot up to see if you can access Windows properly. Two, check whether the settings in the CMOS is incorrect, if not clear, you can choose Load Bios Default project, and then restart, boot to see whether normal access to Windows. Three, press the F8 key at boot time, generally there will be 6 options (if installed DOS6.22 there are 7 options) choose Fourth "step by step confirmation" into a single step operation, the selection of treatment methods according to crash command: 1, the implementation of the "Process the system registry" computer crashes, that registry failure can be restarted by pressing the F8 key, choose fourth, only in the Device=c:\windows\himem.sys this one by "Y", the rest of the press "N", at the DOS prompt input Scanreg / fix or to repair the registry restore scanreg / restore before the automatic backup system registry, and then restart. 2, in the emergence of "Create a startup log file (BOOTTLOG.TXT) [Enter=Y, Esc=N]", select Y to establish Bootlog.txt this file, you can check the boot process of each system file loading situation. If you crash when loading a.Vxd file, you can copy the.Vxd file over another computer and copy it. 3, if a startup occurs, "it is now possible to safely turn off the computer", usually because Windows's System directory's vmm32.vxd is corrupted and can be duplicated on another computer. 4, a start on the blue screen and display VFAT Devcie Initialization Faild, "said calls to the Windows directory under the dblbuff.sys and ifshlp.sys files can be a problem, such as hand to join in the config.sys file: "Device=c:\windows\dblbuff.sys" and "devicehigh=c:\windows\ifshlp.sys", if not, show that the two files are corrupted and can be copied to another computer. Four. Use the text editor to set the LOGO parameter to "0" in the Msdos.sys file. When you turn off and turn on the machine, see if you can access the Windows. If it doesn't work, you can only reinstall the Windows system. In the heavy Windows, first proposed by covering the original Windows, the advantage of this is: if the fault can be ruled out, many of the original program application is no longer installed; if the cover installation does not solve the problem, then using the hard disk formatted after installing Windows. Phenomenon seven: Windows cannot start but can enter safe mode. This failure is generally not a problem, the higher the probability of repair. Specific can refer to the following several methods to do: First, in the installation of new equipment does not start in safe mode, in the "control panel", "system" and select "Device Manager tab, there is an exclamation point conflict of equipment on all equipment listed in search, if any, open the device" attributes "view the Resources tab, look at the conflict of this equipment and other equipment of the interrupt, then cancel the automatic settings check box, click change settings" button, select a unused interrupt number. If not, you can select the "general" tab in the equipment attribute, select the hardware configuration file to disable the checkbox if you can start successfully, that the driver of this hardware may be a problem, you can delete it in the device manager will reinstall the driver. Two, installed, start automatically running, soft can not start normally, you can uninstall it, after the system can be activated, try to reinstall. By the way, the software that runs automatically when the system is installed does not install in the same boot as other software, and can reduce such failures. Three, run automatically when the computer starts the failure of the Windows file does not start, or a case before the software can not be uninstalled (including not completely uninstall), can go to the following places to find and delete it: 1, in the start folder in the program folder in the start menu. 2, Config.sys and Autoexec.bat, if there is, in the front of the line with "REM", do not let it run. In general, antivirus programs add the program to be executed in the two files. Run or Load parameters in the [Windows] section 3, Window directory Win.ini, here can also be in the line with "Rem", don't let it out. 4, Registry (Registry), Run the registry editor (Regedit), enter the editor, use the "Edit" in the "find" function to find the fault of the automatic executable file, will not perform the project's primary key deletion or rename the file. Note: when you modify the registry, you must use the "export registry file" method in advance to do a good backup. Four, if that lost in the system.ini file.Vxd and.386 files at boot time, you can go to other computers to copy the corresponding file to the corresponding position, if not, you can backup your Windows 98 installation directory under the system.ini file, the line and then use a text editor to open the system.ini find the corresponding.Vxd or.386 file, you can delete the row, if the modification is wrong, then you can backup and restore. Five, if Windows does not start is caused by damaged system files, system files can run Sfc.exe file in the Windows\system directory to check and recover lost or damaged, if the problem is the Windows file system needs to use, will be repaired back. Six, if Windows does not start file version is caused by the conflict, you can run the Windows directory of the Vemui.exe file, find out the problems of the file, select "restore selected files (R)" button, Windows98 will automatically use different versions, replacing the current file, and the version conflict manager will make a backup for this file can be replaced, then back. Well, the diagnosis and treatment of the computer cannot start normal fault to say so much, not mentioned in the fault can refer to this article for the following treatment: hardware, using the method of replacement or replacement of slot judgment and troubleshooting; software is more simple, not to format the hard disk to reinstall the system! However, the author still suggests: when the system is stable, do a clone, so need to go back "grams" once.