Turn on the fan and turn it off after 1 turn, and there is no power supply

Replug and unplug all the connectors in the chassis that can be plugged and unplugged.

Try it first, change the power supply, and try it.

No, motherboard problems, to repair.

It may be caused by a short circuit in the hardware, first remove all the plugs that can be dialed, and turn on the computer. Plug them in one by one, and you'll be able to figure out what's wrong.

Supplement: There are IDE port to CPU auxiliary power supply adapter cables sold on the market, so let's be a dead horse doctor.

1.Unplug the hard drive, and see if the power will be cut off after booting.

2.If the power is still off, it is recommended to take it to see, there may be something wrong with the power supply or motherboard;

3.If it is normal and will not lose power, it may be a power supply problem, change to a high-power point power supply to see.

Based on my experience, I will give you a way to judge:

1 It's unlikely, but look at it as well, suspect that the switch on the chassis is out of order. Open the case, unplug the power switch on the case and the connection plug with the motherboard (there are many wires to remember, and you will be able to plug in and restore Oh) Use a screwdriver to replace the boot action on the case, short the power on and turn it on, whether it is normal, normal means that the suspicion may be true.

2 Suspect a power supply problem. Unplug the connector of the power supply on the motherboard, use the wire to turn the plug on the left side of the glue handle and the two ports adjacent to the glue handle (I say the left side refers to the glue grip facing the socket), then the fan in the power supply will turn, if it will not stop, the power supply may be fine.

3 Unfortunately, after these two steps, I suspect that there is something wrong with the part of the motherboard that provides the holding current to the power switch, maybe when you plug the power supply into the motherboard again and find that it can be used normally, just like you were not sure before, and it will be the same as before**.

The computer is turned on, and the power fan turns and does not respond, which may be due to the following reasons.

1. 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.

2. If it doesn't work, it may be that the computer has static electricity, causing adverse reactions. We can find a piece of metal wire to help connect the computer screws, and the other end of the wax to the metal that is in contact with the ground at home. It is better to buy steel wire to be beautiful.

3. It is also possible that the memory module is in poor contact, which is quite possible. Remove it and wipe it clean with an eraser. Then plug it back in, to be steady. Dual memory note compatible.

4. Computer fan problems. Fan problems will cause the system to determine that there is no fan, and in order to protect the computer motherboard, it will force a silent slide to stop the computer from starting. Solution: Check whether the fan is in good contact. Re-installed in a re-posture position. It's best to add some heat sink.

5. Graphics card problems. It's also quite possible. Most of them are poor contact. Simply remove it and reinstall it. The screws should be tightened. The installation should be stable and slow.

6. Motherboard problems, if it's okay. That could be the motherboard. If this is the problem, then you can only go to the repair shop to check if there are any problems such as bad sectors.

The power fan of the computer starts up and stops when it turns and it can't be started.

There may be several situations when the boot fan of the computer is turned around: 1. The fan is blocked, which is the most common, resulting in an increase in the internal temperature of the computer and poor heat dissipation of the computer, so it is necessary to disassemble the computer and clean up the radiator, fan and internal nodes. 2. If the power supply itself is faulty and the power supply is bad, the computer will not be able to turn on, and the power supply needs to be replaced to solve such problems.

3. If the motherboard of the computer fails, the motherboard will stop supplying power, which will also cause the computer to fail to boot and the motherboard needs to be replaced to solve the problem. Since each failure situation is different and the specific solution is different, it is recommended that you can find a professional to repair it so that you can solve the computer problem better and faster.

The computer is turned on, and the power fan turns and does not respond, which may be due to the following reasons.

1. 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.

2. If it doesn't work, it may be that the computer has static electricity, causing adverse reactions. We can find a piece of metal wire to help with the computer screws, and the other end to connect the metal at home that is in contact with the ground. It is better to buy steel wire to be beautiful.

3. It is also possible that the memory module is in poor contact, which is quite possible. Remove it and wipe it clean with an eraser. Then plug it back in, to be steady. Dual memory note compatible.

4. Computer fan problems. Fan problems will cause the system to determine that there is no fan, and in order to protect the computer motherboard, the computer will be forcibly stopped. Solution: Check whether the fan is in good contact. Reinstall. It's best to add some heat sink.

5. Graphics card problems. It's also quite possible. Most of them are poor contact. Simply remove it and reinstall it. The screws should be tightened. The installation should be stable and slow.

6. Motherboard problems, if it's okay. That could be the motherboard. If this is the problem, then you can only go to the repair shop to check if there are any problems such as bad sectors.

The main performance of the fan is reflected in the following aspects: speed, fan blade shape, fan blade, and CPU fan.

1. Angle and bearing system. In general, the speed of the fan is indicated on the manual of the radiator. Generally speaking, 30% of the heat dissipation effect of a radiator depends on the speed of the fan.

But the higher the fan, the better. The correct fan speed should be determined according to the heat generated by the CPU, and the fan speed selection of different specifications should be differentiated.

The basic principle is: under the premise of generating the same air volume, the larger the fan, the lower the speed, and the noise will also be smaller, generally between 3500 rpm and 5200 rpm is more conventional.

2. The greater the power, the stronger the fan wind, and the better the heat dissipation effect. The power of the fan is directly related to the speed of the fan, that is to say, the higher the speed of the fan, the more powerful the fan. At present, the best fans in the general computer market are DC 12V, and the power varies from W to W, so the power needs to be selected according to the heat generated by your CPU.

3. A better radiator, there will be no burrs on the edge, no deformation of the heat dissipation fins, smooth bottom without cracks, neat appearance, generous shape, quality assurance, anti-counterfeiting marks or other characteristic trademarks, etc. In addition, when choosing a radiator, you should also pay attention to the bottom of the radiator should not be too thick, because the thermal conductivity of aluminum is not very good, and too thick will affect the transfer of heat;

In addition, the deflector groove on the surface of the radiator should be denser, which can ensure that the radiator can have a large contact area with the air, so as to enhance the heat dissipation effect. Generally, computer enthusiasts will give the CPU ** water cooling fan when the economy allows, and achieve the effect of rapid cooling through the circulation of liquid.

BIOS Setup Issue: Check if the BIOS settings are correct, it may be because the fan's control mode is incorrect, causing the fan to rotate all the time. In the BIOS settings liquid, you can try setting the fan control mode to "Smart Control" or "PWM Control", or turn the fan speed down.

Power supply issues: Check if the power cord is securely connected, or try to replace it with another power supply.

Faulty hardware: If none of the above methods solve the problem, then it is possible that the CPU or motherboard is faulty and needs to be replaced or repaired.

When everything is normal after turning on the power supply, but the fan is still rotating after turning it off, it may be because the power supply has current leakage or there is a power supply setting problem, which causes the power supply to fail to turn off normally. You can try disconnecting the power cord or replacing it with another power source to solve the problem. Blind burial.