What is the reason why the ASUS motherboard fan loses its ability to rotate?

What’s wrong with the ASUS motherboard fan not spinning?

1. The power cord of the CPU fan is not plugged into the CPUFan (CPU fan) interface of the motherboard, but is plugged into another fan interface. Although this plug-in does not affect the normal operation of the computer, the BIOS cannot detect the operation of the CPU fan.

　2. The power cord of the CPU fan is in poor contact with the corresponding interface on the motherboard. This situation is relatively common.

　3. The CPU fan used is a substandard product. The motor has only two power lines and no speed measuring wire in the middle, so it cannot feedback the fan speed information to the BIOS.

　4. There are differences in the electrical performance indicators of the speed measuring wire between the motherboard and the CPU fan of this machine. As a result, the BIOS cannot obtain correct electrical information. However, this situation often results in a large gap between the fan speed reported by the BIOS and the actual speed. Under the premise that the first and second situations do not exist, the reported speed will generally not be zero.

Troubleshooting: After analysis, we have a general understanding of the causes of false alarms, so that we can solve the problem in a targeted manner. After inspection, it was found that the power cord of the CPU fan was plugged into the BAKFan (spare fan) interface. Plug it into the CPUFan interface correctly, and then monitor it in the BIOS. Everything is normal.

The motherboard fan is not spinning, what should I do?

1. Check whether the power supply of the CPU fan is plugged into the CPU-FAN interface of the motherboard.

　2. Confirm whether the motherboard is powered on, and check whether the power supply fan rotates after being powered on.

　a. If it rotates, the CPU fan is faulty, replace it.

b. It does not spin. The cause of the fault may be that the motherboard is not powered on and the CPU fan does not spin.

　3. First, you need to troubleshoot the chassis power-on button failure. Use a screwdriver to short-circuit the power SW pin on the motherboard.

If you can turn on the computer, it means that the switch keyboard of the host is faulty. Insert the RESET SW cable on the chassis into the POWER on the motherboard. SW pin, so that the reset button of the chassis becomes the power on/off button.

　4. If the short-circuited power supply fan and CPU fan do not rotate, then you need to find a paper clip.

Find a set of 24-pin (some are 20-pin) cables on the power supply. Find the green wire and the black wire. There is only one green wire and there are several black wires. Choose one close to the green wire. Just use any of the black ones!

No response when the computer is turned on, the motherboard is powered on, and the power supply fan does not spin?

First make sure that the mains power is connected to the power input terminal. Under this premise, there are four reasons why the computer cannot be turned on: First: There is a problem with the chassis switch. This is easy to test. Open the chassis, pull out the chassis switch connection cable, and then use a screwdriver to short-circuit the two wires connected to the chassis switch on the motherboard. Pin. If the power fan rotates at this time, it proves that there is a problem with the chassis switch. If it does not rotate, proceed to the next check; Second: Power supply problem, test method: open the chassis and pull out all power plugs, connect the power supply to the mains, use a paper clip Or bend the iron wire into a U shape, use it to short the green wire plugged into the big plug on the motherboard (pin 14 for 20-pin, pin 16 for 24-pin) and the black wire. If the power supply fan does not work If it is a power supply problem, change the power supply. If the fan is spinning, proceed to the next check. Third: Motherboard problem, test method: Remove all the cards, memory, CPU, and connecting cables plugged into the motherboard, and only connect the motherboard to the power supply. After powering on the power supply, short-circuit the two pins of the switch on the motherboard. , if the power supply fan does not rotate, it proves to be a motherboard problem (usually the motherboard startup circuit or a short circuit). If the fan is spinning, proceed to the next check. Fourth: There are short circuits in various boards, memory, CPU, hard disk, optical drive and connecting cables. Test method: Insert the power-on test one by one. Insert a short-circuit switch pin on the motherboard. If the computer cannot be turned on after inserting an accessory or connection cable (the power supply fan does not spin), there is a problem with the accessory or connection cable. Replace it. Or just install it after repairing it.

Gigabyte motherboard, why doesn’t the system fan spin?

The reason why the Gigabyte motherboard system fan is not spinning may be as follows:

The motherboard power supply circuit is faulty, causing the CPU fan to fail to operate normally.

The CPU fan wire is in poor contact or the wire interface connector is damaged, causing the CPU fan to be unable to transmit power normally.

The CPU fan is stuck by dust or other debris, causing it to fail to operate normally.

CPU fan coil failure or breakdown, resulting in inability to operate normally.

The system is running abnormally or software conflicts, causing the CPU fan to be unable to be controlled normally.

For the above reasons, the following solutions can be adopted:

Check whether the power supply circuit of the motherboard is normal. If there is any problem, repair or replace it in time.

Check whether the CPU fan wire is in good contact and whether the interface connector is intact. If there is any damage, replace or repair it in time.

Remove the CPU fan and clean it to ensure it can operate normally.

Replace the CPU fan or repair the coil failure.

Reinstall the system or upgrade the driver to eliminate possible faults caused by software conflicts.

It should be noted that when performing the above operations, you need to disconnect the power supply first and ensure that your hands are dry to avoid short circuits or other safety issues. If the problem persists, it is recommended to contact a professional for repair or replacement.

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