Computer power box fan not spinning? The fan does not spin when the computer is turned on?

If you encounter the problem that the computer power box fan does not spin or the startup fan does not spin, don’t worry. PHP editor Zimo will introduce you to the common causes and solutions to this problem. This article provides detailed troubleshooting steps and recommended actions to guide you in diagnosing and fixing the problem. Read the following to learn how to solve the problem of computer power supply fan not spinning and ensure that your computer is running properly.

The fan of the computer power box is not spinning?

Let me explain. When the computer is connected to the power supply, the fan will not spin. Even if you turn on the switch on the back of the power supply, it will not spin because the power supply does not receive a power-on signal. It is very simple to check whether the power supply is normal. In the 24PIN interface of the power supply, use an iron wire to short the green wire pin and any black wire pin, and the fan of the power supply will rotate. The fan of many power supplies turns and stops quickly because it detects that there is no load. When you connect the power supply to the motherboard and press the power button, the motherboard will send a POWER ON electrical signal to the power supply. At this time, the power supply starts to work and the fan starts to spin. The reason is the same as above when you short-circuit the green wire and the black wire. The same line. There are also some high-end power supplies that have a strategy of stopping the fans at low loads, because those power supplies have very high conversion efficiency, generate very little heat at low loads, and do not need fans for heat dissipation. If the fans are stopped, there will be no noise. I remember that the Cooler GX650 does not have this setting. The fan should start spinning after it is turned on. If it does not turn on, then there is a problem with the power supply.

The fan does not spin when the computer power is turned on?

Another possibility is that there is too much dust inside the computer mainframe, causing the power supply fan to not run smoothly. At this time, we only need to use a pump or hair dryer to clean the dust inside the computer mainframe. Just clean it.

1. If the fan does not spin when the laptop is turned on, you need to confirm whether the fan is broken, then check whether there is too much dust accumulated in the fan, then confirm whether there are signs of rust in the fan shaft, and finally eliminate the above factors. Then send the computer to a professional repair shop.

2. Chassis fan and cpu fan. The case fan is installed on the computer case to dissipate heat for the entire internal space of the computer case, while the CPU fan is mainly installed on the CPU processor to dissipate heat from the CPU. Generally speaking, 30% of the cooling effect of the radiator depends on the speed of the fan. But the higher the fan speed, the better. The correct fan speed should be determined based on the heat generated by the CPU. The selection of fan speeds of different specifications should be differentiated. This is a basic principle.

3. What should you pay attention to when buying a computer power supply? Power supplies have a certain degree of redundancy. For example, a power supply with a rated power of 300W can still work stably and normally at 310W, but try not to use it beyond the rated power. , otherwise the power supply or other computer components may be burned due to overcurrent. In the nameplate label of zero power supply products in the city, Cai Technology’s power supply does not indicate its power parameters on the label nameplate.

Why does the fan not spin when the computer is not connected to the power supply?

Let me explain.

After the computer is connected to the power supply, the fan will not rotate. Even if you turn on the switch behind the power supply, it will not rotate because the power supply does not receive the power-on signal. It is very simple to check whether the power supply is normal. In the 24PIN interface of the power supply, use an iron wire to short the green wire pin and any black wire pin, and the fan of the power supply will rotate. The fan of many power supplies turns and stops quickly because it detects that there is no load.

When you connect the power supply to the motherboard and press the power button, the motherboard will send a POWER ON electrical signal to the power supply. At this time, the power supply starts to work and the fan starts to spin. The principle is the same as what you have mentioned above. Short the green wire the same as the black wire.

There are also some high-end power supplies that have a strategy of stopping the fans at low loads, because those power supplies have high conversion efficiency, low heat at low loads, and do not need fans for heat dissipation. If the fans are stopped, there will be no noise. I remember that the Cooler GX650 does not have this setting. The fan should start spinning after it is turned on. If it does not turn on, then there is a problem with the power supply.

The fan of the newly purchased computer power supply is not spinning?

If it is good, it will not turn on after power is turned on. Generally, there are pinout definition instructions on the power supply. You can connect the pg.on wire to the black wire and then turn on the power. At this time, the power supply has output. pg.onThe root is green first. If you are not sure, it is best to find someone who knows how to do it for you. Wouldn't it be dangerous? Electricity is invisible and intangible, safety first

The computer power supply is out of power and the fan won’t spin?

Confirm whether the fan is broken. If it is broken, you can take it to a maintenance center to replace it or repair it.

If the fan is normal but does not rotate, there may be too much dust accumulated in the fan. When cleaning, you can use cotton swabs or paper to wipe off the dust. Since it may be charged with static electricity, remember not to use it during this process. Wipe with wet towel.

If you find that the fan shaft is rusty, disassemble the fan and apply some professional lubricating oil on it.

If the above inspection shows that there is no problem with the fan, it may be caused by the computer motherboard.

The computer cannot be turned on after reassembly. The power is still on. The fan isn't spinning either?

wrote: Please check the CPU-related circuits or the host power supply.

So, 1: Check whether the motherboard power supply is plugged in.

2: Check whether the CPU auxiliary power supply is plugged in.

Then, it’s best to take a picture of your installation so we can see if there is any problem with your wiring.

Finally, you can first describe why the computer cannot be turned on. For example: the CPU fan spins a few times, then stops spinning; it still never spins.

For example, the monitor will light up for a while, but still not light up all the time.

For example, does the motherboard have Didi and Didi alarm sounds?

You only have a picture of the test card, which contains too little information.

The power supply fan does not spin when the computer is turned on, will the cpu fan spin?

If the computer power supply is turned on and the computer can work, the probability of the fan being broken is very high. If the CPU fan does not rotate or the computer power supply fan does not rotate, either the circuit contact is poor or the dust is too large and the shaft cannot rotate. , or the fan is broken and the coil is damaged. Dust removal maintenance or fan replacement is required. Do not work for long periods of time as it may affect computer performance or cause overheating and crash.

The fan of the computer power supply does not turn on, even if it is replaced with a new power supply, what is going on?

Analysis: The computer has been idle for a long time, resulting in poor hardware contact. If the host indicator light is on or off, and the screen is powered on but has no signal or displays "nosighal", it is usually due to poor contact of the memory module or damage to the graphics card. Suggestions:

1. If the monitor is powered on but shows no signal, shut it down (if a short press of the power switch is ineffective, press and hold the switch until the power indicator light goes out or unplug the power cord directly). Turn off the power, open the case, and plug it in again. Pull out the memory stick, wipe the golden finger with an eraser in one direction (you can also scrape the back of your thumb nail), install it and then turn on the computer.

2. If the above operation is ineffective, shut down the computer, open the case, re-insert and unplug the graphics card, and tighten the data cable between the monitor and the graphics card. If it still doesn't work, consider the graphics card is damaged and replace it with a new one.

3. If the host can display when connected to other monitors or the local monitor still cannot display when connected to other normal hosts, it means that the monitor is damaged and needs repair.

I just finished assembling the computer and the CPU fan doesn’t spin when I turn it on?

The reasons and solutions are as follows

The processor fan power cable has poor contact with the motherboard interface. This situation is relatively common, because desktop computers can easily accumulate some dust, etc., resulting in poor contact. Therefore, the BIOS cannot detect the processor fan;

If some users are unlucky and buy unqualified processor fans, this situation will also occur. You can check, some unqualified motors only have two The power cord, and there is no speed measuring wire in the middle, naturally cannot feedback information to the BIOS;

The power cord of the processor fan is plugged in wrongly and is not plugged into the processor Fan (processor fan) interface of the motherboard. It will not affect the normal operation of the computer, but the BIOS cannot detect the processor fan.

How to solve the problem that the CPU fan of the assembled computer does not spin:

Problem phenomenon: a new configuration The assembly machine works normally when used normally. It's just that in the motherboard BIOS, the processor fan speed is reported as 0 rpm (rev/min), but the fan is actually running well.

What should I do if the computer power supply fan does not spin?

It may be because there is a problem with the memory slot. Unplug the memory stick, wipe the gold finger clean with an eraser. If you can't find the eraser, you can use clean white paper, and then insert it back into the memory slot. If the fault persists, it is most likely not a memory problem. If possible, you can use another Memory replacement experiment. What to do if the computer power supply fan does not work: 1. There is a problem with the chassis switch. Open the chassis and pull out the chassis switch connection cable, and then use a screwdriver to short-circuit the two pins on the motherboard that are connected to the chassis switch. If the power fan turns on at this time, it turns out to be a problem with the chassis switch. 2. Power supply problem. Open the case and pull out all the power plugs. Connect the power supply to the mains. Use a paper clip or wire to bend it into a U shape. Use it to connect the green wire (20-pin) to the big plug on the motherboard. It is the 14th pin, the 24-pin is the 16th pin) and the black wire are short-circuited. If the power supply fan does not rotate, it is a power supply problem. Change the power supply. 4. There are short circuits in various boards, memory, CPU, hard disk, optical drive and connecting cables. Insert the power-on test one by one, and short-circuit the switch pin of the motherboard. If the computer cannot be turned on after inserting an accessory or connecting cable (the power supply fan does not spin), there is a problem with the accessory or connecting cable. Replace or repair it. Just install it again.

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