The computer can t turn on, what should I do if the CPU fan turns and stops

Causes and solutions for CPU fans not turning.

Method 1: The CPU fan is faulty. Under normal circumstances, the CPU fan is powered by the motherboard, and the power supply interface can be found by following the fan's cable.

If you find that the cable is loose, you can try to reconnect it and plug it firmly at the interface. If the CPU fan returns to normal operation, the problem has been resolved. If the CPU fan still doesn't rotate, you can try to connect the power cable to another other same power supply interface, if the fan is running, it means that the CPU fan power supply interface is damaged, but the impact is not big (just the BIOS can't detect whether the CPU fan is running).

Method 2: CPU fan dust blocking. If the desktop is used for a long time and is not cleaned, it will cause dust deposits on the CPU fan and block the fan blades.

Remove the CPU fan and use a brush to clean it, and drip an appropriate amount of lubricating oil on the fan shaft to reduce resistance.

1. Reason: The power supply fan will not rotate once it turns, which is a typical boot self-protection failure.

Second, the finch reform is handled as follows:

1. Dial off the memory, power on, see if the fan stops, don't change the power supply if it stops, connect the power supply to the false load to see if the 12V power supply is normal, if it is normal, the motherboard is taken to repair, generally the motherboard reset circuit failure, the motherboard PWM chip failure, and the 12V power supply load is short-circuited to the ground.

2. If you dial the memory and the fan keeps turning, listen to whether there is a boot self-test sound. If there is an error sound in the memory, do not easily use the replacement method to eliminate the fault in the slippery situation of replacing the memory, and it is possible to burn the equipment continuously.

3. CPU fan.

1. CPU fan, also known as cooling fan, is a fan used to dissipate heat from the CPU, which is provided to the radiator and chassis, and is used to quickly conduct the heat of the CPU and blow it into the nearby air to cool down. The quality of the cooling effect is directly related to the quality of the CPU cooling fan and heat sink.

2. There are many types of CPU fans according to the installation size, bearing type, number of blades, etc.

Generally, the CPU power supply on the motherboard is short-circuited, you check, this is it. It can also be a short circuit in the power box.

How can a 200W power supply run a computer, when did you buy your computer, change it to a 300W power supply. If the power supply is insufficient, the computer will not be able to start, and the situation you said will occur, and the CPU fan will stop after a turn.

As for you long press to turn on the phone, and soon hear a "pop", generally the lack of power supply will not damage the hardware, but it is possible that the power supply will be broken. You just change a 300w power supply and try it out, you know, if not, take it to the computer city, find a maintenance point to get a 300w power supply to connect it, it can be turned on normally, and then buy the power supply, hehe.

Answer pro, hello ( , I am very happy to serve you, it is a kind of fate and a kind of luck to meet you here, I hope that today you are a little happier every day than yesterday, here for the questions you raised and find more suitable information for you is:

1.Loose memory sticks or oxidized gold fingers. 1. First of all, remove the memory module.

2. Use a dry cloth or eraser to wipe the gold finger part of the memory with a dry cloth or eraser. 3. After wiping, insert the memory module back into the memory slot and restart the computer again.

Mistake 1: First remove the coin cell battery from the motherboard and leave it for a few minutes. 2. Wait for the end of placement and install the coin cell battery in place to restore the initial value of the BIOS. 3. Restart the computer again and observe whether the computer starts normally.

3.Too much dust 1. Too much dust accumulates, increasing the temperature of the hardware, and affecting the life of the hardware. 2. You can use a brush and a high-power hair dryer to clean up the dust.

4.The motherboard power supply is faulty 1. If the above three methods do not solve the problem, you can take the computer to the computer store for repair. 2. If the hardware is within the warranty range, you can find the after-sales service, and if you don't have it, you can only replace it by yourself within the warranty period.

Check the filter capacitors in the motherboard and power box, and replace all bulging ones.

Remove all external devices, only keep the motherboard, CPU, memory, graphics card, power supply, see if it can be turned on, as long as the display is displayed, it means that these 5 basic are normal.

If you can't, you can replace the test machine one by one, and which one can be turned on means that the one that is replaced is bad.

Caused by insufficient power supply.

There is a problem with the interface of the CPU fan.

Motherboard problems, some boards are of poor quality, resulting in this kind of problem, or the board is aging.

The fan shaft is aging, that is, it can't start normally, but it can be used with the help of external forces, which means that the fan is worn too badly, just change the fan.

The hard drive hangs, I've seen it before.

This kind of problem in the computer needs to be detected and then eliminated: 1. Memory problem; 2. Power supply problems; 3. Motherboard problems. The corresponding detection solutions are as follows:

1.Memory issues.

First of all, rule out the memory problem, unplug the memory strip, wipe the gold finger with rubber, you can't find the rubber, you can also use clean white paper to insert it back into the memory slot (the slot is best to use a brush to remove dust), if the fault is still a memory problem (unless the memory bar is broken).

2.Power issues.

Secondly, it is the turn of the power supply after the memory problem is ruled out. This problem can only be tested by the average user. First of all, unplug all the plugs of the power supply, turn on the power, find the tweezers (preferably tweezers, direct or slightly thicker wires will also do) let go of the 20-pin or 24-pin plug of the power supply, find the plug with plastic buttons, the third and fourth pins are green and black, insert the tweezers (or other) at both ends, if the power fan is turned, the possibility of the power supply being bad can basically be ruled out.

3. Motherboard problems.

The only remaining problem is the motherboard problem, which is the most likely. You can't check this yourself, discharge the motherboard first, vacate the CMOS, the specific operation method: the host is powered off, remove the motherboard battery, come back in about half a minute, and power on.

If this problem persists, it is recommended to send it to the repair board.

This one works with most computer models like the Dell Vostro3668.

1. The computer can't be turned on, and the fan stops when it turns. The low speed of the CPU cooling fan will also overheat the CPU, and the motherboard will detect the CPU overtemperature and shut down the CPU protectively.

2. Generally speaking, it should be a motherboard or power supply problem, and sometimes there will be memory problems. This kind of fault is often encountered,The host Wu Youwu has just been powered on,The CPU fan can be rotated,How to click the boot button when it's over,The restart button doesn't respond。 Turn the power off, power it on again, and turn it around again.

3. The CPU fan turns and stops, and the machine can't be turned on, and there is a problem with the BIOS settings of the motherboard, we can try to restore the BIOS settings to factory settings. We will remove the coin cell battery from the motherboard, leave it for a few minutes and then install the coin cell in place to restore the initial value of the BIOS. Removing the coin cell battery is also very simple and cavity liquid.

4. If there is a problem with the power supply or the BIOS setting of the motherboard, first put the motherboard battery down for a few minutes and then put it back to try.

5. When the computer is turned on, the power supply fan turns and does not respond, which may be due to the following reasons. First of all, it can be a switch problem, such as a bad contact. We turn off the switch on the back of the computer, or simply unplug it.

etc. will be reinserted. If it doesn't work, it may be that the computer has static electricity, causing adverse reactions.

6. In general, the computer fan turns and stops for a while, and it cannot be turned on, which may be due to computer hardware damage, software problems or virus infection.