What if the computer fan doesn't turn?

1. Computer power supply fan turn and stop

Should be power protection, unplug the power from the motherboard, hard disk, optical drive, video card, and so on the internal components of the connection between, and then to the power supply, with a wire will be the largest power source of a large line of the plug in the Green Line and black line short-circuit, if the power supply is working properly, the focus of the chassis to check the components, The question of which to install is the last part of the installation. If the power supply is not in no-load (without connecting the motherboard and other parts) the short circuit Green Line and the black line are still fans turning and stopping, the power supply internal failure, but seemingly not serious, check the two-time side filter capacitor has no expiration, Schottky diode has no breakdown, still not check the protection circuit.

　　2, computer CPU fan turn and then stop

It is expected to be a motherboard or power problem, and sometimes a memory problem may occur. This kind of trouble I have encountered many times, the host just on the electricity, the CPU fan can turn, finished how to start key, restart key did not reflect. Turn off the electricity, turn on the electricity, and go again ...

You can use the following methods to exclude in turn:

First of all, remove the memory problem, unplug the memory, and wipe the gold fingers with the eraser, can not find the eraser with clean white paper also line, and then plug back into the memory slot (slot preferably with a brush to clear the dust), if the fault is still, it is likely not a memory problem (unless the memory bar is bad), if there is a condition could be replaced with another good memory experiment.

Memory problem out of the turn to the power, the average user can only do a simple test, first unplug all the power supply plug, access to electricity, find a pair of tweezers (preferably tweezers, paper clips straightened out or a small piece of thick wire) to the power supply 20-pin or 24-pin that one to let go, find the row with plastic buckle card, The third and fourth needles are green black, the tweezers (or other) inserted at both ends, if the power supply fan to turn, the power of the possibility of a bad basic can be ruled out.

The only problem left is the motherboard, which is the most likely scenario. This is not a good test of your own, but you can first discharge to the motherboard, clear the CMOS, the specific method of operation: Host power off, the motherboard battery off, about half a minute put back, power can be. If the problem persists, recommend to repair the motherboard, or to understand the computer friends to help you do. The above three kinds if all can use the substitution method that is the most simple and effective, if the hand does not have to replace the spare parts to be able to simply carry on the above operation.

　　3, computer graphics card fan turn and stop

From the hardware to prove the problem, is really the problem of power supply, the rated output is not stable, leading to the CPU, motherboard, memory, hard disk, optical drive, graphics and other equipment. If not sure, you can unplug the optical drive and the hard drive power cord, retry the boot to see whether normal. (The best advice is to replace the power supply)

From the software side, this is because the virus in the system caused by hard disk partition table error, first determine whether the power supply is normal first, such as the power supply or the same situation, and then install the system separately. Because the main symptom, is the power supply with fixed hardware.