Troubleshoot computer hardware FAQ

1 motherboard capacitor damage causes graphics card to work abnormally

Case

My computer suspected that the motherboard is broken, open the chassis, found that the AGP side of the electrolytic capacitor has been bulge, how to solve?

[Case analysis Processing]

The capacitor has the characteristic of AC-DC breaking and the electrolytic capacitor acts as the filter in the circuit. The capacitor drum is due to high temperature, high pressure and capacitance of its own quality, according to the nominal value of the capacitor on the motherboard to replace the corresponding capacitor, troubleshooting.

2 Power switch failure causes press the Start button unresponsive

Case

My Computer pressed the power button does not respond, how to solve?

[Case analysis Processing]

power button and the motherboard is directly connected, after the failure, take apart the chassis, found that there is no strange, see the jumper, all normal, with a multimeter test, the original connection to the motherboard power supply line (on) the line has been broken off;

3 Faulty jumper causes the machine to be unable to open the solution

Case

My computer can not open the machine after changing the jumper, how to solve?

[Case analysis Processing]

On the motherboard, pw+ and-is the power switch connection point, if these two wiring installation error, will directly cause the power switch cannot turn on, thus can not boot; according to the instructions corresponding to the pw+ and-insert into the relevant interface, connected to the power, the failure to eliminate.

4 motherboard Capacitor damage causes no boot

Case

My computer can not boot, open the chassis, and found that the power supply and CPU fan are working properly, how can i solve?

[Case analysis Processing]

Because the motherboard is integrated with a power management chip, can control the power supply output, power supply and CPU fan can rotate normally, the motherboard power part of the basic normal, take apart the chassis, with a multimeter detection, found that the motherboard CPU socket side capacitor can not reach the nominal value, the replacement of similar capacitors again after the power-on, the failure to eliminate.

5 Typical solutions to the conflict between the motherboard and the graphics card

Case

My Computer is ATI9600 graphics card, motherboard is KT600, motherboard and graphics card always conflict, how to solve?

[Case analysis Processing]

At present, many ATI9600 and KT600 in the market conflict, in the installation system after the performance of the crash, or the start of a sudden black screen, such as instability, through a number of experiments, found that the solution to the conflict is: because ATI9600 with a common display interface and another LCD interface, Practice has proved that there is a conflict between the ATI9600 LCD interface and the KT600 (partial motherboard). When installing the ATI9600 driver, there will be 2 driver signatures for you to confirm, at this time the first digital signature is your normal display interface driver, press "yes" to install this drive, the second driver signature for the LCD interface driver, press "No" does not install this driver can solve the fault you described. Alternatively, you can boot to safe mode to disable the LCD interface driver (typically the second video card).

6 motherboard virus protection causes system to not install properly

Case

When my Computer installs Windows XP, there is always a line of warning prompts, how to solve?

[Case analysis Processing]

Now the motherboard in order to prevent viruses such as cih attack, so the virus warning is integrated, and when Windows XP is installed, the installer writes some of the startup information to the boot partition of the hard disk, and the motherboard thinks that the operation of the installer may pose a threat to system security, prompting the user to prevent loss of data; Reboot the computer into the BIOS and set the virus Warning to disabled troubleshooting.

7 Determine the unknown PCI device hardware

Case

My computer in the Device Manager has a name for PCI device hardware, can not find a suitable driver, how can i solve?

[Case analysis Processing]

Now the motherboard uses the hub bus design, different from the original north-south bridge design. Due to the late release of the Windows98 SE version of the previous operating system can not fully identify some chip information, resulting in the Device Manager we see the unknown hardware. It is only necessary to install the Intel chipset INF file in the CD that comes with the motherboard to troubleshoot the problem.

8 BIOS Setup error raises memory parameter error

Case

My Computer motherboard is pan is 8rda3+, memory is DDR400, why the boot display is DDR333, how can i solve?

[Case analysis Processing]

Because Pan is 8rda3+ motherboard provides cpu/memory/AGP frequency fine-tuning function. This is caused by the failure of overclocking. Since the BIOS settings are restored by the default settings after overclocking the device, many motherboards now fix the BIOS defaults to the lowest hardware device they can support, so your DDR400 memory is set to work at 166 frequencies, or 333 of RAM. In the BIOS, set the memory operating frequency to 200, troubleshooting.

9 BIOS Setup Error causes system to recognize CPU errors

Case

My computer is Ahlon xp2500+, why is 1G displayed in Windows XP system Information? How can i solve it?

[Case analysis Processing]

This is caused by the motherboard not being properly identified by the CPU. Since most motherboards now support multiple frequencies of CPUs, it is safe to set a conservative value for the factory. CPU options in the motherboard BIOS set the CPU to 2500+ FSB 133, then save the reboot and troubleshoot.

CPU socket Contact Bad induced startup failure

Case

My computer turned on display

warning! CPU or CPU ratio has been changed

Please re-enter CPU settings in the setup! and soon freezes, how to solve?

[Case analysis Processing]

The message to the prompt is: "Warning!" The processor or processor has been changed. Please enter the installed processor settings again. This is due to problems with the CPU, the BIOS does not properly identify the CPU, the CPU fan is removed, reseat the CPU, the failure to eliminate, therefore, the reason for failure in this case is the CPU socket contact Bad

One DirectX accelerator is incompatible with the acquisition card and causes the machine to restart

Case

My computer in the video compression, the system will automatically restart, how to solve?

[Case analysis Processing]

When the system prohibits some of the acceleration of DirectX, the early video capture card can be normal work, but the speed will have some impact, and open all the acceleration function, but this kind of early video capture card can not run in the platform based on DirextX8.1; After uninstalling the DirectX8.1, reinstall DirectX7.1, troubleshoot,

12 after overclocking, the computer often reboots.

Case

My computer is AMD Athlon 1700+, recently used 10.5 times frequency after the computer often found automatically restart, how to solve?

[Case analysis Processing]

Reducing the CPU frequency is beneficial to the stability of the system, in this case, however, there is a system instability, which can be judged in the case of the CPU for fakes, the CPU to detect, found that the nominal value and the actual value of a large discrepancy between the same frequency of replacement products to the platform, the failure to be excluded.

Typical case where Windows XP can start but is silent after CPU overclocking

Case

My Computer CPU is P4 2.0GHz, the CPU FSB set to 133, the system can start normally, but no sound, desktop icons are missing, how can i solve?

[Case analysis Processing]

As the frequency of the system bus will be increased after overclocking, some integrated sound cards will not work in an overclocking environment, and the CPU FSB should be increased appropriately, such as 110, so that the 1.1-point increase is able to test the optimal frequency of the system, and after the CPU FSB is set to 110, it is found to work properly. Try to raise the FSB 120 again, when the discovery of sound is sometimes not, it is concluded that this hardware platform can work stably under 110 FSB.

14 hardware is not properly installed to prevent the system from using

Case

My Computer sometimes press the reset button to restart will hear "doodle" alarm sound, how to solve?

[Case analysis Processing]

Some hardware contact bad will cause the computer often "toot" ring, after unpacking the chassis, found that the card has a protrusion of the gold finger, will be removed, clean the gold fingers dust and the dust around the AGP, the video card back, the fault can be ruled out. In the computer work environment, dust and electrostatic on the stability of the hardware system is the biggest, we recommend that users can pay special attention to the work of the computer environment to protect the computer can stabilize long-term operation.

15 Computer jumper error causes no boot

Case

My computer can not boot, after unpacking the chassis, found that the power start line short connect can boot, how can i solve?

[Case analysis Processing]

The Power boot line can be powered up properly via a short connection, explain the problem is not out on the motherboard, you can judge, this fault is caused by power button failure, the chassis panel to take apart, use a multimeter test button, found that can not make the start line short-circuit, the start line after the welding again test, found the line back to normal, The boot line is installed on the motherboard and the failure is excluded.

CMOS startup error causes the computer to not start

Case

My computer turns on: "BIOS ROM checksum error detecting floppy drive A media INSERT SYSTEM DISK and press ENTER", how can i solve it?

[Case analysis Processing]

"BIOS ROM checksum error" Chinese literal translation: CMOS to perform a full check found errors, to load system defaults. Indicates that there may be a problem with the CMOS RAM in the BIOS chip. This must be taken off the BIOS chip after the programmer to write the correct BIOS program, the general user because there is no programmer, so you can take the motherboard to the vicinity of the repair point for data can be written back to troubleshoot.

BIOS damage causes Power-on prompt error BIOS information

Case

My computer always prompts when the boot: "The BIOS is not installed", how to solve?

[Case analysis Processing]

"BIOS is not installed" in English means "BIOS not installed", in the past, this kind of fault is obvious CIH virus caused, the processing method is generally to rewrite BIOS data, after using floppy boot to DOS, the BIOS refresh, restart the computer, Found no such hint, troubleshooting.

18 Data line short circuit leads into COMs panic

Case

My computer on the boot when found hard disk model detection error, after a panic, how to solve?

[Case analysis Processing]

Detecting hard drive data errors in the BIOS, is due to the data line short-circuit and make part of the information lost; After the case is taken apart, replace the hard drive data cable, reboot detection, found that the fault is still, plug the data line into another IDE interface, boot, the BIOS can normally identify the hard drive, troubleshooting. As a result, some hardware failures due to a short connection to the data line also damage the IDE interface, preferably using the original data cable when using the data cable.

Incompatible BIOS version causes system to fail to boot after upgrade

Case

My Computer upgrade BIOS, the system self-test Normal, boot to Windows 2000 after the crash, how can i solve?

[Case analysis Processing]

After upgrading the BIOS, hardware settings and information will also change, Windows 2000 because the BIOS has stored the System information before the update, and update the BIOS to bring new system information and the original system information there is a certain conflict between the system, resulting in a crash; turn on F8 key into Windows 2000 security mode, the video card, sound card, network card, drive all uninstall, reboot the system, the normal access to the system, in turn, install the above driver, troubleshooting.

1BIOS Setup Error causes power-on press F1 to enter

Case

My computer in the boot to press F1 to enter, how to solve?

[Case analysis Processing]

Power-on need to press the F1 key to enter, because the BIOS set up with the actual hardware data does not match, in addition to the motherboard battery no electricity will cause data loss resulting in this failure; Reboot the system and enter the BIOS setup. The floppy drive is set to 1.44M, but in fact there is no floppy drive in the chassis, and after this is set to none, troubleshooting.

21 Super Password loss causes the BIOS entry to not be modified correctly

Case

My computer can not set the parameters after entering the BIOS, all the settings are grayed out, how to solve?

[Case analysis Processing]

This is caused by the superuser password set in the BIOS, although ordinary users can use the password to enter the BIOS to view the basic data, but can not change the data in it, open the chassis, reset the BIOS jumper, the BIOS back to the original state, the boot to the appropriate settings, Save after setting a password in the superuser password, then use this password to enter the BIOS, all settings information can be modified, troubleshooting.