Analysis and elimination of common faults in power supply

If the CPU is a strong heart of the computer, then the power is its energy center. The power supply is not valued by the users in PC computer, but it is the product that is often neglected, but it provides stable and continuous current for all computer equipments, such as CPU, memory, optical drive and so on. If there is a problem with the power supply, can not provide energy to other parts, it will affect the normal work of the computer, or even damage the hardware. A large part of a computer malfunction is caused by a power supply. Therefore, do not underestimate this price is not high accessories, careful care! I have a long time as a computer maintenance work, accumulated some computer fault judgment experience, here and everyone to share.

one, the power damage or inferior power to other parts of the serious consequences

1, the capacity of the hard disk appears bad track. Bad power is easy to cause the hard drive to appear false bad, this kind of fault can be repaired by software generally. In such cases, first check the power supply. If the problem is confirmed to be a power supply, the new power supply with reliable quality and stability should be replaced.

2, CD-ROM optical disk reading performance is not good. This situation generally occurs in a newly purchased computer or a newly bought optical drive, when reading a disk with a huge hum, after troubleshooting the optical drive, it is likely that there is a power problem. This failure is usually caused by insufficient power supply, which requires a more powerful power supply.

3, overclocking unstable. Because CPU overclocking work, for the stability of the power supply is very high, if the power quality is poor, after overclocking the computer, often appear sudden panic or restart the phenomenon. Generally as long as a new power to replace a large power on it.

4, the host often inexplicable wonderful to restart. There may be power supply power is not enough, power supply power is not enough to drive the computer all the normal work, resulting in system software run wrong, hard drive, optical drive can not read and write, memory loss, etc., so that the machine restart.

5, computer operation accompanied by "roaring" noise. At this point, the problem generally appears in the power supply fan, making noise increase, if the computer is often not opened, fan dust accumulate too much, it may occur this phenomenon, the solution is to turn on the computer, remove the power, the fan from the above removed, dust. Then reload again, the general noise will be eliminated after the boot.

6, the display has water ripple. It is possible that the electromagnetic radiation of the power supply, is affected by the magnetic field, interfering with the normal display of the display, if long-term attention, the display may be magnetized.

If your computer is in use in the above failure, then please check and repair your power supply as soon as possible, otherwise it will cause greater loss. For more intuitive introduction of the trouble caused by power failure, here I would also introduce myself to encounter a few power failures.

Failure One: The system freezes, the original is caused by the power aging

Fault Reason: A 2002 brand purchase machine, CPU for Celeron D 1.7GHz, 128MB DDR266 memory, 40GB Seagate Hard Drive, and then upgraded with a 128M memory, configured with a built-in 56KMODEM and TV card, The fault appeared. Specific performance for the system started shortly after the crash, the monitor black screen no signal, the optical drive light long bright. Whether into the WIN98 system, with the system disk boot, or into the CMOS system will appear this fault, once the crash either reset key or power button can not shutdown, only pull the latch and must wait for a certain period of time before the boot.

Failure Analysis: Because this machine just installed the operating system, so it is not possible to be caused by software failure, in order to troubleshoot software failures, notes or reinstall of the operating system, the problem remains. Considering that the CMOS settings can also cause a panic condition, then restore CMOS initial settings, open the chassis to remove other cards to minimize the boot, replace the memory, check the CPU fault still, using a multimeter to measure the internal power supply plug voltage is normal, because this machine for ATX power supply to the motherboard plug can not unplug the measurement, So there is no measurement. Analysis of the machine purchase has been more than two years and internal configuration board more, the power supply in the long-term high load may be a power supply part of the fault.

Troubleshooting: Because the brand home computer, can not carry out the replacement of the power supply part of the inspection, had to take the mainframe computer company to deal with, the results of computer companies on the operation of all normal and continuous operation for a few hours did not appear the crash phenomenon. Back home after the boot failure is still, start to think will not be related to the mains? By measuring the mains voltage up to 240V higher than normal voltage, to find a regulator plus the later dynamic fault elimination, a few hours in a row of normal operation. Analysis of the aging of power components, long-term high load operation has not been able to play a stabilizing effect, household and did not configure UPS power supply caused by high voltage can not work properly. This failure has been satisfactorily resolved.

Conclusion: The power supply is the source of the whole energy of the computer, and also the place where faults are more frequently. For better use of computer home machine should also be configured UPS power supply, the purchase should be a better power to choose the best brand power, so you can avoid the long-term use of similar problems appear to ensure the normal operation of the computer.

fault Two: The computer's own power cause voltage instability caused by

Symptom: The author's computer is configured for Pentium 4 2.0GHz processor, MSI 845PE Motherboard, Seagate 80GB hard Drive, installed with a network card and a built-in cat. In the summer, the computer suddenly automatically power for several days in a row, the specific performance of the power indicator light, the fan in the chassis buzzing straight, the monitor is not shown.

Repair and Resolution: Previously, the computer shutdown after the power plug is not pulled straight, I've never seen anything like it. I first installed the secondary system, can be a few days after the failure is still, the elimination of software failures may be the author's motherboard has "d-led" function, the system from the power to the boot system in the process of testing each step to open the chassis, Found in the host automatic Power, "d-led" of the four detection lights for all red, indicating that the host is only through the electricity, did not carry out any other work.

Because the host automatically after the monitor does not show, so carefully read the instructions, found that the motherboard CMOS settings in the Power Management settings (Management Setup) resume on Ring/lan key defaults to "Enabled" think of the inside of the box cat-- is not the summer night voltage instability, so that the cat received the wrong signal and caused the host to automatically power it? Immediately reboot into the CMOS settings to see, sure enough resume on the Ring/lan item set to "Enabled"  then changed to "Disabled" disk restart, the failure to eliminate.

Conclusion: The author of the Power plug for a long time, coupled with a large summer voltage fluctuations, which led to the occurrence of such a failure from this, the author after using the computer will Power plug unplug, also be cut, long wisdom!

How, through the above two faults, you will get some enlightenment. Yes, the power supply seemingly obscure accessories, once there are problems, the same let you do not use the computer, so we buy the power must buy those good quality products, as far as possible to choose the rated power of large products to prevent future upgrades due to the lack of power supply caused by a variety of failures.