The computer host can t start, and the fan stops after two turns?

It's not a fan issue. Your console or a piece of hardware has a short-circuit option, and the boot is a voltage dip, and the power supply is turned off for protection. The possibility inside the power supply is relatively large, open the case and look carefully.

In addition, the minimum boot is the motherboard, CPU, memory, and graphics card, which are indispensable.

Refer to my previous question on a similar issue: It is estimated that your computer's power supply is not enough output power due to the aging of the device. It is difficult to start the computer after a long shutdown time or it crashes during the startup process, automatically restarts or some hardware cannot be loaded normally, generally there may be a problem with the host power supply, and the output voltage of several groups of the power supply has just reached the minimum requirements of the motherboard, and the voltage drops when the computer uses a lot of power, and the computer restarts.

You can disconnect the optical drive to reduce the power consumption. If so, change the power supply.

My computer just now, the host fan turned very loud, but it couldn't be turned on, I was so angry that I punched the host, and the host started immediately.

The computer won't turn on, and the fan stops when it turns

Check whether the CPU and heatsink have been moved, the CPU is overheated, and the motherboard detects that the CPU is over-temperature and the CPU is shut down protectively.

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.

Check whether the power connector is loose, whether the fast fuse in the power supply is blown or the power cord is broken.

There is a short circuit on the motherboard or machine, causing the power supply or motherboard protection circuitry to work.

There is a fault in the motherboard or the power supply is in poor contact with the motherboard connector.

The motherboard BIOS settings have changed.

Solution: Turn off the power immediately, carefully check and eliminate various faults, restore the factory settings of the motherboard, remove all boards and peripherals (hard disks, optical drives, etc.), and go to the smallest system to see if it can reliably boot into the motherboard BIOS interface.

What are the reasons why a computer fan is too loud:

1.The notebook itself has hardware protection measures, when the system temperature reaches a certain height, especially the CPU temperature is high, the notebook will increase the speed of the exhaust fan, and begin to dissipate a lot of heat, some notebooks will not rotate when the workload is low, and only when the system temperature is too high will the exhaust fan be started to dissipate heat, in this case it is conducive to the stability and safety of the machine, so it is not within the scope of discussion.

2.Refuel the exhaust fan, buy a bottle of sewing machine oil, if you have peanut oil at home, you can also use this instead, add oil to the exhaust fan shaft and the groove attached to the coil, and then install it after a while after oiling, so that you can basically solve the problem of loud sound.

3.The position of the exhaust fan is offset due to excessive dust accumulation or loose fixing screws. The solution is: clean up the dust and re-fix the screws.

Summary. Desktop computer host fan turns and stops and can't turn on the machine Hello dear, the computer fan turns and stops, and can't turn on, which is very likely to be two reasons: (1) The first reason:

It is the reason for the power supply of the host, due to the virtual soldering phenomenon of the internal components of the power supply, such as the rectifier diode, the switch three tubes, the pulse width modulation IC, etc., the filter capacitor leakage, etc., it is possible to turn and stop when the machine is turned on, and then turn and stop after a while, and the machine cannot be turned on. Solution: Generally, if such a problem occurs, you can only repair the power supply or replace the power supply of the host.

2) The second reason: it is a problem with the motherboard, such as the virtual soldering failure of the components in the boot circuit, such as the clock, reset, field effect tube problem, and the virtual soldering of the south bridge, which will lead to a turn and stop at the boot, and cannot be turned on. Solution:

Jianyi sends after-sales or repair department to repair or replace the motherboard. I hope I can help you! If my answer is helpful to you, please give a thumbs up (comment in the lower left corner), look forward to your like, your efforts are very important to me, your support is also the motivation for my progress, and finally I wish you good health and a happy mood!

The desktop computer host fan turns and stops, and it can't be turned on.

Hello dear, the computer fan turns and stops, and the machine can't be turned on, which is very likely to be two reasons: (1) The first reason: is the reason for the host power supply, due to the virtual soldering phenomenon of the internal components of the power supply, such as rectifier diodes, switch three tubes, pulse width modulation IC, etc., there is a virtual soldering problem, filter capacitor leakage, etc., it is possible to turn and stop when starting, and turn and stop after a while, and can not turn on.

Solution: Generally, if such a problem occurs, you can only repair the power supply or replace the power supply of the host. (2) The second reason:

It is a problem with the motherboard, such as the failure of virtual soldering of the components in the boot circuit, such as the clock, reset, field effect tube, and the virtual soldering of the south bridge, which will lead to a turn and stop at boot, and cannot be turned on. Solution: Jianyi sends after-sales or repair department to repair or replace the motherboard.

I hope I can help you! If my answer is helpful to you, please give a thumbs up (comment in the lower left corner), look forward to your like, your efforts are very important to me, your support is also the motivation for my progress, and finally I wish you good health and a happy mood!

The desktop computer host fan turns and stops, and the machine can't be turned on, and the memory module is still the same, and it is still the same when you turn it and stop it.

The desktop computer host fan turns and stops and can't turn on the machine to clean up the memory module or the same turn it to stop Hello dear, motherboard problems, here it is recommended that you go to a professional after-sales point to overhaul Oh, I hope mine can help you! If my answer is helpful to you, please give a thumbs up (comment in the lower left corner), look forward to your like, your efforts are very important to me, your support is also the motivation for my progress, and finally I wish you good health and a happy mood!

1. The memory is loose or the gold finger is oxidized

Remove the memory, press the buckles on both sides of the memory slot, you can pull out the memory module, wipe the memory with a dry cloth or eraser, the memory gold finger part, reinsert the memory into the memory slot, and try to boot it.

2. Motherboard BIOS error failure can also cause this problem:

Restore the initial BIOS value by restoring the BIOS settings to factory settings, removing the coin cell battery from the motherboard, and then installing the coin cell battery in its original position.

3. Dust is the biggest killer of hardware:

Dust accumulation is too much, increasing the temperature of the hardware, will affect the life of the hardware, clean up the dust can be cleaned up with a brush, high-power hair dryer, the dust will be removed.

4. Motherboard and power failure

The above methods are not good, it may be caused by the failure of the power supply or motherboard, take the computer host to the computer store for testing, and rule out whether it is a power supply problem.

components

1. Chassis (the shell of the main unit, used to fix each hardware).

2. Power supply (host power supply system, used to supply power to the host for voltage stabilization).

3. The motherboard (the body that connects the hardware in the host).

4. CPU (the brain of the host, responsible for data processing and processing).

5. Memory (temporarily store the data that the computer is calling).

6. Hard disk (the storage device of the host, used to store data).

7. Sound card (processing the audio signal of the computer, with motherboard integration and independent sound card).

Discharge the BIOS battery (restore the BIOS factory defaults) It is recommended to plug and unplug the graphics card and memory, clean it up, and polish the gold finger of the graphics card and memory (if you can't solve it, you can repair it).

Troubleshooting method for computer not turning on:

Step 1: First of all, check whether the external wiring of the computer is connected, and plug in each cable again to see if the fault is eliminated.

Step 2: If the fault persists, then open the main chassis to check whether there is any excess metal in the chassis, or a short circuit caused by the deformation of the motherboard, and smell whether there is a burning paste in the chassis, whether there are burned chips on the motherboard, and whether the capacitors around the CPU are damaged.

Step 3: If not, then clean the dust off the motherboard and check if the computer is in good condition.

Step 4: If the fault persists, unplug the reset cable on the motherboard and connect it with other switches and indicator lights, and then use the change cone short-circuit switch to see if it can turn on.

Step 5: If you can't turn it on, then use the minimum system method, unplug the data cable of the hard disk, floppy drive, and optical drive, and then check whether the computer can be turned on. Then connect the above devices to the computer one by one, when connecting a certain device, the fault will recur, indicating that the fault is caused by this device, and finally focus on checking this device.

Step 6: If the fault persists, the fault may be caused by devices such as memory, graphics card, CPU, motherboard, etc. Then, use the plug-in method, swap method and other methods to check whether the memory, graphics card, CPU and other devices are normal, and replace the damaged devices if there are damaged devices.

Step 7: If the memory, graphics card, CPU and other devices are normal, then discharge the BIOS, use the isolation method, place the motherboard outside the chassis, connect the memory, graphics card, CPU, etc. for testing, if the computer can be displayed, then install the motherboard into the chassis for testing until the cause of the fault is found. If the fault persists, you need to return the motherboard to the manufacturer for repair.

Step 8: When the computer is turned on without display but there is an alarm sound, when the computer is booted up, the system BIOS starts to POST (power-on self-test), when it detects a fatal error in a device in the computer, it will control the speaker to send out a sound to report the error. Therefore, there may be a fault that the power is turned on without displaying an alarm sound.

If the computer is turned on and there is no alarm sound, the luck can check the faulty equipment according to the meaning of the BIOS alarm sound to eliminate the fault.