Sunday, January 15, 2012

How to determine CPU failure

Maintenance of learning through the power, A power failure would King know there can not start the computer, work instability. However, A King does not understand why sometimes even the power supply is working properly, the same failure will occur the same reason, so he found the master and eager to understand the reason. It so happened, the master also is preparing to explain the content, so the A side of King will sit quietly, listen carefully to them. 
When a computer appears to be unstable and so can not start after power, if the excluded power, memory and software viruses and other factors lead to the possibility of failure after the next you need to check if the CPU has a problem. Failure caused by the CPU performance, although varied, but also nothing less than the frequent crashes sum up, POST displays the operating frequency of repeated changes, and can not boot due to excessive overclocking, and system power-up without any reaction of several way. Of course, should not the same way also the following, we will be introduced:
1. Frequent crashes
This failure are quite common, mainly due to generally poor work by the cooling system, CPU and the socket is bad, BIOS settings in the CPU temperature errors caused alarm. Largely focus on measures taken to CPU cooling, reliability connectors and check the BIOS settings to make. For example: check the fan is running (if necessary, even replace the large amount of exhaust fan), check the heat sink and the CPU contact is good, too is uniform coating of thermal grease, remove the CPU check the pin and socket contacts are reliable, enter the BIOS setup to adjust the temperature protection points.
2. POST does not show the normal operating frequency
Specific performance of the boot CPU operating frequency to reduce on-screen display "Defaults CMOS Setup Loaded" prompt, re-set the CMOS
The CPU parameters, the system return to normal display, but the fault appears again. For this situation and the CMOS battery or the motherboard on the corresponding circuit. The first case of this failure to follow the easier maintenance principles, the first measurement of the motherboard battery voltage, if the voltage is lower than 3 volts, you should consider replacing the CMOS battery. If replacing the battery did not take long, fault appeared, it is the motherboard CMOS power supply circuit components exist leakage, then take the motherboard repair.
3. Can not boot due to excessive overclocking
Excessive overclocking, computer cooling fan may start rotating normal, and hard disk light only flashed it would not be a reaction, but also maintain the standby display failure. Since then enter the BIOS setup options have not, therefore, will not be able to reduce the frequency of the CPU. In such situations will be handled in two ways:
(1) open the case and found on the motherboard discharge to CMOS jumper (button batteries are generally arranged in the vicinity), set in the "CMOS discharge" position or pull out the battery, wait a few minutes a little later, then reset the jumper or the battery and restart your computer.
(2) Most newer motherboards now have a dedicated overclocking failure recovery measures. For example: You can press the Insert key in the boot and hold, then the system starts it will automatically enter the BIOS setup options, can then be down-operation. In some more advanced motherboards, overclocking can also take the initiative after the failure of "self-healing" CPU's default operating frequency. Therefore, keen to overclocking but the lack of practical experience of ordinary readers, the choice with a "by-trillion overclocking", "overclocking failure automatic recovery," user-friendly features such as motherboards, overclocking the CPU work will become very simple easy.
4. Power up the system does not respond
Generally in the face of this failure can be "alternative method" to determine the exact location of faults. If the elimination of the motherboard, power supply lead to the possibility of failure, you can determine the problem and multi-CPU internal circuit damage. If so, then it can only be solved by replacing the CPU.
Tip: Some people think that the higher the CPU cooling fan speed, heat the better, in fact, this understanding is more one-sided. In fact the fan cooling capacity and the number of blades, angle, the effective ventilation area, exhaust volume have a direct link, and improve the speed, although you can increase the amount of exhaust, but it will bring increased noise, loss of life and other issues. Therefore, the choice of cooling fan should be taken into account.

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