Example analysis of common CPU failures

Eliminate the user to the CPU overclocking caused by the burning, we are in the normal use of computers encountered CPU processor failure is not uncommon. In general, if the computer can not start or very unstable, we will be from the motherboard, memory and other easy to fail to troubleshoot the accessories, if the motherboard, memory, graphics, hardware and other accessories no problem, then the CPU must be the problem.

In general, the CPU after the failure of very easy to determine, often have the following performance:

1, after the system without any reflection, that is, we often say that the host is not lit;

2, the computer frequently freezes, even if in the CMOS or the DOS will also appear freezes the situation. (This situation occurs in other parts of the problem, such as memory, after this situation, you can use the exclusion method to find the source of the fault);

3, the computer constantly restart, not usually boot soon after the phenomenon of restart;

4, the computer performance decline, the degree of decline is quite large.

Many friends through the elimination method to find the CPU failure, do not know how to exclude, that the CPU failure, under normal circumstances will have to replace the new products. In fact, in many cases, as long as the CPU processor does not burn, we can still solve all kinds of problems. Next, in the form of reality to introduce a number of causes of failure and solutions.

One. Analysis and solution of computer frequent crash failure

Symptom: A host of Intel Celeron 1GB, a frequent crash occurred during the recent use process. Specific performance: After the boot can smoothly into the Win98 system, but the use of about 15 minutes, the system will panic,

Failure analysis: Dead memory, graphics cards or motherboards and other accessories which a problem can cause a panic, so using the replacement method, the host of various accessories in one by one after the replacement focus on the CPU. Through detection, found that the CPU's core operating voltage of 1.2V, and Celeron 1GB default operating voltage of 1.5V, the problem is definitely on the processor.

Troubleshooting: Because the default operating voltage of the CPU is 1.475V, today, only 1.2V work voltage, so the reason for the computer often die is the CPU is not enough to cause, this situation is likely because of the motherboard components aging, resulting in the power supply part of the voltage is low, the CPU naturally can not work, the crash is inevitable. Like overclocking, the CPU will not be very stable after the lifting frequency, some need to increase the voltage to stabilize the higher frequency, this reason, in fact, a considerable part of the computer failures and power-related.

Through careful inspection, found on the motherboard on the CPU power supply circuit on a chip capacitor a little yellowing of the signs, so use the multimeter to test it after the discovery has been damaged, after replacement troubleshooting.

There are many reasons for the lack of CPU power supply, first of all, we should check whether the power of the machine match, the author encountered many machines can not start or instability is caused by the direct power supply. Check the power before we should first consider whether the computer has been added cards and other accessories, some brand-name machine power and the total power of the system is exactly the same, add a new board will likely cause power supply shortage. Therefore, if you have to add new equipment to take down after the equipment to try, if not, then it is necessary to consider the stability of power supply, in some places the power supply instability will also appear such a problem, if it is possible to install a voltage regulator. In addition, the installation of too many USB peripherals will consume a lot of power and may also cause system instability.

Similar problems often occur, a friend once bought a video card, home found not bright, it is estimated that a lot of people at this time will be considered the problem of graphics card, so take back to change, but in the dealer there measured a bit, unexpectedly no problem. The unlucky friend naturally felt puzzled, after a few trips to and fro, eventually changed a 300W power supply to solve the problem. The possibility of computer hardware failure is too much, so we usually solve their own problems, it is best to think about several aspects, considerate is the first foundation to solve the fault.

In addition, due to poor CPU heat, it may also cause the panic condition. This failure may lead to frequent crashes in Windows, even in DOS or motherboard access to the CMOS. If the CMOS will be in the crash, it is likely due to the CPU caused by the crash. In this case, you can focus on the CPU cooling. When the failure occurs, you can open the chassis to explore the CPU temperature is very high, such as a hot phenomenon.

Of course, the appearance of this malfunction, it is also possible that CPU overclocking is too high to cause the CPU voltage in the pressure can not control, so when the voltage range of more than 10%, it will increase the electronic migration of the CPU, resulting in the CPU internal injury and the crash, serious will also appear to burn the CPU phenomenon. Therefore, we should not be too high CPU overclocking, instead of the CPU can add a high-power fan, but also use other cooling measures to allow the CPU to better heat to solve the problem.

Second, the motherboard constantly reboot failure analysis and elimination

Failure performance: In order to make love machine safe through summer, the author in June to buy a CPU radiator, after the installation of the machine stable operation for one months, because the author used the computer frequency is not high, so also did not encounter any problems. But as the frequency of use increased and the weather became hotter, problems arose. The machine can only work 40 minutes after the boot, and then restart, with the use of more and more time, the frequency of restart is increasing. The source of the fault is then locked on the replacement heatsink.

Failure Analysis: The heat generated by the CPU can not be dispersed in a timely manner, but it will occur because of the high temperature and frequent crash phenomenon. Under normal circumstances, if the host work for a period of time after the phenomenon of frequent panic, we must first check the heat dissipation of the CPU.

Troubleshooting: Since you determine the source of the problem with the radiator, in the case of the power of the radiator fan to see the operation, all normal, indicating that the fan is no problem. So after the radiator is removed, through the familiar cleaning after reloading, after the boot problem as before. So after replacing the cooling fan, everything OK. Is there a problem with the heat sink, after repeated comparisons finally found that the original buckle is the direction of the reverse. As a result, there is a gap between the heatsink and the CPU core, the CPU overheating, the motherboard detecting CPU overheating, and restart protection. Improper installation of the original CPU cooling fan will also cause Windows to automatically reboot or not boot.

CPU with the technology and integration of continuous improvement, the core heat is a relatively serious problem, so the current CPU on the cooling fan requirements are increasingly high. The problem caused by improper installation of the cooling fan is quite common and frequent. If you are using a CPU such as Pentium 4 or Athlon, choose a CPU fan with good quality and be sure to focus on the correct installation method. Otherwise, the light is machine restart, heavy-fried CPU burned.

In addition, if detected in the BIOS to detect the CPU temperature rise too fast, it may be a problem with the CPU heatsink, or incorrect installation. Excessive operating temperature will result in electronic migration phenomenon, thereby shortening the CPU life. For the CPU 53 ℃ under the temperature is too high, long-term use of the system is easy to cause instability and hardware damage.