Common computer startup and shutdown fault analysis

Source: Internet
Author: User
Tags safe mode socket

One, the definition example

the failure associated with the startup and shutdown process. Startup is the problem that occurs when the self-test completes and enters XX as the System application interface; Shutting down the system is the process of switching from a click off to a power disconnect.

second, possible fault phenomena

1, the start of the process of panic, error, black screen, repeated restart, etc.

2, in the process of the launch of a file error;

3, during the boot process, always perform some inappropriate xx (such as always disk scan, start an abnormal application, etc.);

4, can only be started in Safe Mode or command line mode;

5, login failure, error or panic;

6, shut down XX as the system when the crash or error.

III. Possible components involved

BIOS settings, boot files, device drivers, XX as System/application configuration files, power supplies, disk and disk drives, motherboards, signal cables, CPUs, memory, and other possible board cards.

Iv. points of judgment/order

1, before the maintenance of the preparation

1) disk data cable;

2 multimeter;

3) virus-checking software.

2, environmental inspection

1 machine peripheral and appearance inspection:

A. Mains connection is broken sad, should not be too loose or inserted in place of the phenomenon;

B. Whether the host hard drive indicator is correct and shiny, should not be light or often bright phenomenon;

C. To observe whether the system has peculiar smell, the component temperature is high;

D. See if the CPU fan speed is not enough, or whether it is too slow or unstable;

E. Listen for any abnormal sound when working on the drive.

2) Drive connection check:

A. The power connection of the drive is correct and the cell is broken. Whether the power connected socket on the drive has a virtual connection;

B. The jumper settings on the drive match the location of the drive attached to the cable;

C. Drive data cable is wrong or missing, specification is in accordance with the technical specifications of the drive (such as: Support DMA66 Drive, must use 80-core data cable);

D. Drive data cable is faulty (such as exposing the core wire, there are dead bends or hard marks, etc.), in addition to the observation can be judged, but also by replacing a data cable to check;

E. Drives are connected to the system through other boards, or through other boards (such as hard disk protection cards, dual network isolation cards, etc.).

3) Check the installation of other parts:

A. By reseating the part (including CPU, memory), check to see if the failure disappears (before reseating, you should do the dust removal and clean the gold finger work, including the slot). If always by reseating to solve, should check the parts installed, whether too loose, after the size of the board is not suitable, the socket is too tight, so that plug in place or be squeezed out;

B. Check that the CPU fan is in good contact with the CPU. It is best to reinstall once.

4 shows the contents of the observation: pay attention to the contents of the screen error, the location of the crash to determine where the fault may occur.

3, fault judgment points

1) Fully communicate with users to understand the process of failure to start and the user's XX;

2) BIOS setup check:

A. If you have just replaced different types of hardware. If the motherboard BIOS supports the Booteasy feature or the BIOS anti-write switch is turned on, it is recommended that it be turned off, pending completion of a full boot, and then open;

B. Whether new hardware has been added. At this point should be removed from the added hardware, to see if the failure disappeared, if, check whether the added hardware is faulty, or the system settings are correct (by comparing the use of new hardware Manual check);

C. Check the settings in the BIOS, such as the boot sequence, device parameters for the boot disk, and so on. It is recommended to restore by clear CMOS;

D. Check that the XX system does not start or shut down due to BIOS problems (including settings and functions), and try to rename the Bios.vxd (or Vpbiosd.vxd) in the Windows directory to Bios.old, reboot, or close, and if the failure disappears, modify the BIOS device or update the BIOS to fix it, otherwise it has nothing to do with the BIOS. Note that after the test is completed, it must be changed back to the original name (note: Except Windows98, other XX as the system does not have this document);

E. In some special cases, you should consider upgrading your BIOS to check. For example: After the first boot up, some applications or equipment can not work, in addition to checking the device itself, you can consider updating the BIOS to solve.

The following inspection should be done under the software minimum system.

3) disk logic check:

A. Check that the partition on the disk is correct, the partition is active, or is formatted according to the error prompts during the startup process

B. Directly check whether the hard disk is partitioned, formatted;

C. Join one of the other failed drives (such as a floppy drive or optical drive) to check if you can boot from another drive (if you use the floppy drive, it's best to start with the Seagate's Test floppy). If can, carry on the examination of the 3rd, 4) step, otherwise carry on the examination of Step 5th), then, whether the partition is activated, have the bad way etc.

D. Whether the boot partition on the hard disk is activated, and whether it has a startup file or command to use on startup;

E. Check that the boot partition on the hard drive is accessible, and if not, check the hard drive for trouble with the appropriate manufacturer's disk checker. Failure, replace the hard drive, in the absence of failure, through the initialization of the hard drive to detect, if the failure persists, replace the hard drive;

F. When you cannot start with another drive, remove the hard drive to see if it can be started, and if it is still not, the parts in the software's smallest system should be checked individually, including the common parts of the hard drive and the disk transfer--the disk interface, power supply, memory, etc. If it can be started, it is best to do a initialization of the hard disk XX, if the failure does not disappear, then replace the hard drive;

G. If you want to initialize the hard drive xx, but the user has useful data, suggest users find data repair company to solve.

4) XX for system configuration check:

A. For prompts for file errors, the file should be repaired according to the corresponding software debugging method mentioned in the first part;

B. In cases where it is not bootable, it is recommended to check if the failure can be eliminated by selecting the previous startup or by using the Scanreg.exe to restore the registry to the earlier backup registry;

C. Check that there are no Third-party programs running in the system, or improper settings in the system or device drivers that cause abnormal startup. Here special attention should be paid to Autoexec.bat and Config.sys files, should be shielded from these two files, check whether the startup failure disappeared;

D. Check startup settings, items in the Startup group, key values in the registry, and so on, and whether unnecessary programs are loaded;

E. Check for viruses. Requires that only one antivirus software be installed in a system;

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