As soon as the computer is turned on, the light is on, but the fan turns twice and stops, and the mo

In this case, the power supply is protected by a short circuit, you can change the power supply now, if it doesn't work, it is your motherboard, hard disk, optical drive, and other equipment that have a short circuit, and eliminate them one by one.

The light can only show that the computer power supply can be powered, and the display does not show that the computer is not turned on at all, and the reason why the machine cannot be turned on is likely to be that the fan does not turn, the CPU is damaged, the memory, and the graphics card, according to the above reasons, the failure of the memory and graphics card should be eliminated, and there are several reasons why the fan does not rotate, the fan itself is broken, or the power supply is not good, and the CPU damage generally does not cause the fan to not turn.

Analyzing the above reasons, you can start from small to large, starting from the following aspects:

1. Check whether the fan is good and whether the connection is normal.

2. Check whether the power supply is normal.

3. Check whether the memory is good.

4. Check whether the CPU is good.

It may not be a fault that prevents the machine from being turned on, but depending on the situation, it is likely that the fan or power supply is the cause. But the worst scenario is that the motherboard breaks.

A little shallow, shallow.

The motherboard is broken, or just the RAM is broken.

In my opinion, if the following four don't work, change the host!!

Is there an alarm sound, if there is, it's a memory problem, take it out and erase it with an eraser!

Problems with the motherboard or voltage.

The computer keeps turning on and restarting, the display screen is not lit, and the fan stops when it turns + it can be turned on again every other night.

The computer has been turned on and restarted, the display screen is not bright, the fan turns and stops + can be turned on again every other night, hello, first, the power supply is aging and damaged, and it is often manifested as the fan turns and stops. Replacing the power supply can be solved. Second, the power switch is damaged.

This is not common, but this is the case with my Dell computer, unplug the power switch to the positive and negative poles of the motherboard switch, and use a screwdriver to short the positive and negative poles, if you can light up the computer, the switch is undoubtedly damaged. 3. Static electricity. When you upgrade the memory, pay attention to unplugging the power cord, and it is best to touch the radiator or the like to release your own static electricity.

For now, unplug the power cord, it is best to cut off the battery on the motherboard, press and hold the power button of the case a few times, and then quickly press the power button a few times to release the static electricity in the case. Install the motherboard battery, connect the power cable to try whether the boot can light up the first step, encounter the problem of the fan stopping and turning down You should check the way of memory module detection Unplug one by one to test the boot status. If you can turn on the subordinate machine and won't restart, it's a memory problem, if not, it's not memory.

The second step, if the memory detection is fine, or can't turn on the CPU fan or still stop and turn down, check whether the host power supply is good, the detection method is the replacement method, test with other new power supplies, if it can be turned on, it will automatically restart, it is basically a problem with the power supply, no doubt. The third step, if it still can't be solved, consider detecting the motherboard problem, which may be the motherboard's protection. I hope my answer is helpful to you, and I wish you good health and a happy mood!

Summary. Kiss Hello thank you for waiting I'm glad to answer your question The computer can't start, the fan will stop after a while, and then turn again, and the monitor shows no signal Kiss Now this situation is definitely not a matter of the power supply, and the possibility of the motherboard malfunctioning is relatively large.

The computer can't start, the fan stops after a while, and then turns again, and the monitor shows no signal.

Hello, thank you, you're waiting for you, I'm glad to be able to answer your questions, the computer can't start, the fan will stop after a while, and then turn again, and the display shows no signal.

Dear you do this first, test the power supply first, take out the power supply and test it separately, the connector of the power supply connection motherboard has a green wire and a gray wire on it, and then you use the answer to the missing wire short circuit, orange if the power supply fan does not stop running, it means that there is no problem with the power supply.

Of course, if the power supply turns for a while, Bi Heng stops blindly for a while, then it means that it is a problem with the power supply. At the same time, you can also try plugging in a different port of memory, or try a memory module with the same rate. If there is no problem with the power supply and memory, it is most likely a problem with the motherboard circuit, and it is very likely that which part is burned.

and damaged components, if there are any, then go directly to the repair.

Kiss <>

If you can't detect it visually, you can also use the simplified method to remove all the external devices connected to the host, and only start the host separately to see if it can start normally, mainly to see if the CPU and power supply fan can rotate normally, if you can, it means that there is no problem with the motherboard.

This condition is usually caused by a hardware failure, which can be a problem with the computer's motherboard, power supply, fan, monitor, etc. It is recommended that Zhaoqi follow the following steps to troubleshoot:1

Check that the computer is properly connected to the power cord and whether it is stably powered on. 2.Check that the internal fan of the computer is working properly and that there is no abnormal noise or heat.

3.Check whether the monitor is properly connected to the power cable, signal cable, etc., and whether it is in a normal state. 4.

If the above steps fail to solve the problem, it is recommended to contact a professional computer family Shuling maintenance personnel for maintenance or replacement of faulty hardware. 5.If the computer is still under warranty, you can contact the after-sales service provider for repair or replacement.

This issue is most likely caused by a hardware failure, and it is recommended to follow these steps to troubleshoot:1Check that your computer has enough power** pure hail, make sure your computer is connected to a stable power source, and try replacing the power outlet.

2.Check that the internal hardware of the computer is plugged in, such as memory modules, graphics cards, etc., and replug these hardware to make sure they are securely connected. 3.

Clean up dust from the inside of your computer case, especially fans and radiators, as dust can cause overheating. Make sure the fan is turning properly and that there is no dirt on the surface of the radiator. 4.

If none of the above steps resolve the issue, then you may need to replace the faulty hardware or seek help from a professional for further diagnosis and repair. In short, the above situation may involve multiple hardware problems on the computer, which need to be carefully troubled and repaired. It is recommended to consider taking your computer to a professional repair shop for testing.

Summary. When the computer is turned on, the CPU fan will not turn after a few turns, which may be caused by the following reasons: insufficient power supply.

2.It is recommended to check the power supply, or replace the power supply. There is a problem with the interface of the fan.

4.This interface may be the interface with the motherboard, or it may be the wire and fan interface, if it is this problem, you can change the fan to test it, and you will know it by trying.

When the computer is turned on, let the CPU fan turn a few times and it will not turn for the following reasons: insufficient power supply. 2.

It is recommended to check the power supply, or replace the power supply. There is a problem with the interface of the fan. 4.

This interface may be the interface with the motherboard, or it may be the wire and fan interface, if it is this problem, you can change the fan to test the Tan Min car, and you will know it by trying.

Does a CPU fan refer to a cooling fan on a CPU?

"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.

Will the power supply be insufficient if it is used for too long?

Yes, the power cord is too long and will affect the voltage, especially at low voltage. The resistance of the wire itself is proportional to the length of the wire and inversely proportional to the cross-sectional area of the wire, that is to say, the longer the wire, the greater the resistance, the greater the cavity attenuation, the thicker the electric circle wire, the smaller the resistance, and the smaller the voltage attenuation.

Hello dear, I am glad to answer for you that there are many reasons why your computer won't boot properly. Figuring out whether the problem is caused by hardware or software can help resolve the issue. 1. First of all:

Check all cables, including power plugs, to make sure all devices are connected correctly and securely together. 2. Next, check if the power is turned on. Listen to the sound of the power supply fan to see if the hard drive is working properly.

If you don't hear anything, you may need to replace the power supply unit. To determine this, consider using a power supply test device, such as PC Power and Cooling, to test the power output. Of course, before removing the computer, you should check the power shorts in the room and try to see if you can turn on other live devices to make sure there is no problem with the circuit.

3. If the power supply is normal, but the screen is still dark, try to connect another monitor to the computer (you can borrow one if necessary) to make sure that it is not a problem with the monitor. If the monitor is working fine, change the **connection cable and see, still no image? If the hard drive is working properly at this point, it is likely that the graphics card has failed.

To replace the motherboard with a new one, see our article "How to change the graphics card", or use the motherboard's integrated graphics card, if the motherboard has this feature. When the case is opened, check that all the fans are working properly after the power is turned on, and the computer may also be experiencing overheating. 4. If your monitor is working fine, but the hard drive doesn't boot up and the display doesn't have any images (or you can see the images but the computer won't boot with the self-test), consider resetting the CMOS.

Turn off the computer, unplug the power supply, and remove the battery from the motherboard by wearing anti-static protective gloves, etc. Then wait about five minutes and consult your PC's user manual or visit the manufacturer's ** for information on how to reset the CMOS settings. Restart your computer after the setup is successful and see if the problem is solved.

5. If the computer still can't turn on and remove the block, the culprit may be a broken memory module. Remove one piece of memory at a time (or replace it with known normal memory) and restart it after each replacement. In addition, you can create a free memtest86 boot disk on another computer and use it to select memory modules.

6. If the above methods do not work, it is possible that the motherboard or CPU is broken and needs to be replaced. However, at this time, the data on the computer may still be intact, as long as the hard drive is connected to another PC host, you can take all the data out. Consider going to a computer repair shop to have your computer repaired, which is more cost-effective than getting a new one.

If you're using a laptop, a repair shop may be your best and only option. I hope you can help you.