How does the computer automatically reboot? Introduction of checking method of computer frequent reboot power failure phenomenon

If you exclude the cause of the virus, you focus on whether the CPU, graphics, such as poor cooling caused by overheating, CPU protection will automatically restart. Check the power is good to do, first the host power off, the main board of the Power plug unplug (the old point of 20 stitches, the new 24-pin, with a piece of thin wire, inserted into the green Line of the hole, the other end into any one of the black hole, and then connected to the power supply, if the fan rotation, there is no other abnormal, proof of the basic power supply is not a problem.

　　The following are some of the host boot on some of the fault classification, phenomenon and solutions:

First, no display on the boot (divided into the monitor is not displayed and issued the alarm sound) completely did not display:

1, power supply has no work, to determine whether the power supply in the work can be inspected three places:

One, the power supply on the back of the cooling fan does not turn. Description: If the power supply is broken, its cooling fan will not turn, but also may happen to be the fan itself is broken, it should also check other places to determine whether the power is broken.

Second, the power led on the mainframe panel of the computer is not lit. Instructions: The computer host on the LED indicator, indicating power, hard disk, floppy disk remote work, if these LEDs do not light, it is likely that the power supply is not.

Third, do not hear at startup when the floppy disk drive, hard drive or optical drive working sound. Note: When starting the computer will check these hardware devices, if they do not hear the sound, indicating that the power supply did not supply them at all.

2. If the power supply is not working, how to solve it? If you determine that the power supply is not working, do not think that the power is broken, you can check the following several places:

One, the total switch whether to skip electricity, whether the plug is loose, if there is an extension cord, you should check the extension cord fuse is burnt.

Second, the power supply is due to short circuit and stop power: Because the power supply itself is designed to detect short-circuit function, so it will detect the output of the circuit has a short-circuit, cut off all the power supply, it caused the power does not work. This condition can be seen by the cooling fan's operation, if the power supply is good, and there is a short circuit inside the mainframe, then when the power is turned on, it will be found that the fan turned to stop, and issued the voice of the AIDS, if the switch off after a while, the fan turned a few laps.

This symptom is a typical short-circuit phenomenon. To find the components that cause a short-circuit, remove all DC output connectors from the power supply, if all the connectors have been unplugged, the phenomenon of short circuit disappears, it represents a component of the circuit is short-circuit, can plug the connector back, until the short-circuit phenomenon occurs again, you can confirm that the component is broken, You can replace the component. Be aware that the power needs to be turned off before unplugging and inserting connectors to avoid burning parts of the computer.

Third, DC output of the power supply is normal: if the above three points mentioned the situation has been checked, the power supply is still not working, at this time can be used to measure the power of three meters DC output, if there is no output, the power itself is broken, replace a power supply, should be able to solve the problem