Computer motherboard failure always reboot how to solve

Computer motherboard failure always reboot how to solve

Main engine switching power supply plug loose, bad contact, not plugged

This kind of situation, most will appear in the DIY machine, the host power supply line with the power cord has not been 3C certification, and the power outlet does not match. When we shake the table or touch the host will appear when the host automatically restart, usually accompanied by a slight electric spark "PA" sound.

Workaround: Replace the high quality 3C authentication power cord.

The motherboard's power ATX20 socket has virtual welding, bad contact

This fault is not common, but it does exist, mainly in the normal operation of the host, moving the ATX20 pin plug to see if the host will automatically restart. At the same time also to check the power of the 20-pin plug inside the reed has oxidation phenomenon, it is also easy to lead to contact resistance, poor contact, causing the host to panic or restart. Sometimes also need to check the 20-pin plug the end of the connection line, is reliable.

Workaround:

① if it is the motherboard solder point virtual welding, directly with the soldering iron can be. Note: In the motherboard, hard disk, graphics cards and other computer board welding, must be good grounding soldering iron, or unplug the power plug when welding.

② If the problem is a power supply, it is best to replace a good power supply.

Additional Reason analysis:

1. Virus destruction

Computer viruses have come into being soon after computers. When the network becomes the information artery of today's society, the spread of the virus is more convenient, so it interferes and destroys our normal work from time to time. More typical is a period of time before the global computer caused serious damage to the "shock wave" virus, the attack will also indicate that the system will automatically start in 60 seconds. In fact, early in the DOS era there are a lot of viruses can automatically restart your computer.

For whether the virus damage, we can use the latest version of antivirus software for antivirus, the general will find the virus exists. Of course, there is also a possibility that when you are on the internet has been malicious intrusion into your computer, and placed a Trojan horse program. This allows the other person to remotely control all of your computer's activities, including, of course, getting your computer restarted. For some Trojans, not easy to clear, it is best to reinstall the operating system.

2. System File Damage

When the system files are corrupted, such as the font under the Fonts directory under the Kernel32.dll,win98 under Win2K, and so on, system runtime basic files are destroyed, the system will not be able to complete initialization and forced reboot at startup. You can do a test, the WIN98 directory of the Font "FONTS" to try to change the name. When you turn on the machine again, our computer will continue to start repeatedly.

For this failure, you can only overwrite the installation or reinstall because you cannot get to the normal desktop.

3. Timing software or scheduled task software works

If you set up a reboot or load some of your work programs in the program taskbar, the computer will start again when the timing comes. In this case, we can open the "Start" item, check that there are not familiar with their own execution files or other timed work procedures, shielding them and then power-on check. Of course, we can also enter the "Msconfig" command directly in "Run" to select the startup item.

Hardware

1. Mains voltage instability

General household computer switching power supply operating voltage range of 170v-240v, when the mains voltage below 170V, the computer will automatically restart or shutdown. Because of the fluctuation of the mains voltage we sometimes do not feel, so we will mistakenly think that the computer inexplicably automatic restart.

Solution: For regular power supply instability areas, we can purchase UPS power supply or 130-260v wide switching power supply to ensure the stability of the computer work.

2. The quality of the plug or power outlet is poor, the contact is bad

In the market, most of the power plug-quality is not good, the internal contacts are manual welding, and often use acid flux, so easy to cause in the later use of solder oxide caused by the circuit breaker or the FireWire and 0 lines between the leakage. Because of the manual welding and because of the poor elasticity of the phosphor brass sheet, in less than a long time will be easy to lose elasticity, resulting in contact with the host or monitor power plug bad and produce a larger contact resistance, in the long hours will be a lot of heat and lead to a virtual connection, then the performance for the host reboot or monitor black screen flashing.

There's also a wall outlet that might be used in our home, most of the wall socket installation is not the use of professionals, so the wiring inside the socket is not standard, especially these sockets if we often use high-power electric heater when it is very easy to cause the internal heating oxidation of the virtual connection and the formation of intermittent power, Causes the computer to reboot or the display blink phenomenon.

Workaround:

① do not want to save money and buy cheap and not the beauty of power supply, buy some brand power plug, because its internal machine is automatic installation crimping, no manual welding.

② for the problem of whether it belongs to the inside of the wall socket, we can change the host to a wall socket and try to see if the same automatic restart problem exists.

3. The power of the computer power is insufficient or poor performance

This situation is also more common, especially when we add new equipment for our host, such as the replacement of high-end graphics card, add a burner, added a hard disk, it is very easy to appear. When the mainframe is working at full speed, for example, run a large 3D game, high-speed burning or ready to read the disc, just started, the two hard disk on the copy data, may be due to the instantaneous power supply power shortage caused by power protection and stop the output, but because when the power stop output, the load is reduced, when the power is restarted. Because the recovery time after protection is very short, so give us the performance is the host automatic restart.

There is also a situation, the host switching power supply performance is poor, although the voltage is stable also within the normal allowable range, but because of its output power harmonics in the content is too large, will also lead to frequent host of the crash or restart. For this case, we use a multimeter to test its voltage is normal, it is best to replace a good power supply for replacement removal.

Solution: Now for high-quality high-power computer power.

4.CPU problem

CPU internal part of the functional circuit damage, two cache damage, the computer can also start, and even into the normal desktop for normal operation, but when carrying out a special function will restart or panic, such as drawing table, play VCD, play games and so on.

Solution: Try to screen the two level cache (L2) or the first level cache (L1) in the CMOS, see whether the host can run normally, or simply use a good CPU to replace the elimination. If the screen can be normal operation, or can make do with the use, although the speed is slower, but will be able to save money.

5. Memory problem

If a chip is not completely damaged on the memory bar, it is likely to pass the self-test (most of which will have a post), but at run time will be due to the high memory value caused by the failure of the function and unexpectedly restart. Most of the time when memory corruption, open the opportunity to alarm, but the memory is not damaged after the alarm, no power failure is still available. It is best to use the elimination method to quickly determine the fault area.

6. Optical drive problem

If the optical drive is damaged internally, it can also cause the host to start slow or not to pass the self-test, or it may be suddenly restarted during work. For the latter case, if we have replaced the optical drive, it is likely that the power consumption of the optical drive is different. What you need to know is that although the ATPI interface of the optical drive is the same, but the different manufacturer's PIN definition is not the same, if we have a problem with the hard drive line, it may produce for a certain brand light driven with no problem, but the other brand optical drive can not work, which requires attention.

7.RESET key quality is problematic

If the reset switch is damaged and the internal reed is always in the short position, the host will not be able to power up the self-test. However, when the reset switch is less flexible or the button on the chassis is not easy to bounce, it appears in use because of occasional touch of the chassis or a sudden reboot of the host in the normal use state. Therefore, when the reset switch can not be moved freely, we must carefully check, it is best to replace the new reset button switch or the external button of the chassis lubrication treatment.

There is also a situation, because the reset switch leads in the chassis in the welding insulation layer peeling too much, plus the use of the process of multiple unpacking will cause the reset switch line too close to cause collisions, resulting in automatic restart of the host.

8. Access to the network card or the same port, serial port, USB interface access to external devices automatically restart

This situation is generally due to peripherals have faults, such as the printer's mouth damage, a foot to the ground short-circuit, USB equipment damage to the ground short circuit, the network card workmanship is not standard, when we use these devices, will be due to a sudden power short circuit and cause the computer restart.

Other reasons

1. Poor heat dissipation or temperature failure

CPU heat is not good, often the problem is the CPU heatsink fixed clamp off, CPU heat sink and CPU contact between a foreign body, CPU fan after a long time to use the radiator dust too much, these conditions will lead to poor CPU heat, excessive accumulation of temperature and automatic restart.

There is also the CPU below the temperature probe damage or P4

CPU internal temperature measurement circuit is damaged, the BIOS on the motherboard has a bug in a special condition temperature is not allowed, these will cause the host in the process of automatic protection restart.

Finally, we set in the CMOS CPU protection temperature is too low can also cause the host to automatically restart.

2. Fan speed failure

When the CPU fan's speed circuit is damaged or the speed line intermittent circuit breaker, because the motherboard can not detect the fan speed will be mistaken for fan stop switch to automatic shutdown or restart, but we check may see the CPU fan rotation normal, and the speed is normal.

3. Strong magnetic interference

Do not underestimate electromagnetic interference, many times our computer crashes and reboots due to interference, both from the internal chassis CPU fans, chassis fans, graphics fans, graphics cards, motherboards, hard disk interference, but also from the external power line, inverter air-conditioning and even large equipment such as automobiles interference. If our host interference performance or poor shielding, there will be a host of accidental restart or frequent crash phenomenon.