What should I do if my computer won t turn on? Press the power button to turn the fan once, and then

Hello. This problem has to be eliminated one by one:

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: Open the main chassis and smell whether there is a burning paste in the case, whether there are burned chips on the motherboard, whether the capacitors around the CPU are damaged, etc.

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, the fault may be caused by the 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 5: When the computer is turned on and there is no display but there is an alarm sound, when the computer is booted up, the system BIOS starts to POST (power-on self-test), and when a fatal error is detected 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 fault can be checked according to the meaning of the BIOS alarm sound to check the faulty device to eliminate the fault.

Discharge the BIOS battery, that is, take off the round button battery of the motherboard for 5 minutes (restore the BIOS factory default) 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.

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If there is a fault that the fan stops when it rotates, it is generally checked according to the following steps:

First, check whether the switch button and restart button of the case are elastic and whether they are in good contact, you can unplug the switch jumper and restart jumper on the motherboard, and then short the switch jumper to try.

Check whether the cable connecting the switching power supply to the motherboard is loose, whether it is connected correctly, whether the power supply itself is faulty, whether it is damaged or there is a short circuit inside.

Try changing the CPU supported by the motherboard, if it can boot normally, the CPU is damaged.

If it still can't be solved after replacing the CPU, it is a problem with the motherboard.

Inspection steps, in addition to the first step can be tested by yourself, the back of the basic need for some basic knowledge and experience accumulation, as well as some hardware that can be replaced, it is recommended to go to a professional computer store or computer city for testing and maintenance.

1. If it is a memory problem, unplug the memory module, wipe the gold finger with an eraser, and use a clean white paper to find the eraser, and then insert it back into the memory slot (the slot is best to clean the dust with a brush), if the fault is still there, it is likely not to be a memory problem (unless the memory module is broken), if there is a condition, you can replace the test with another memory.

2. If the memory detection is okay, or you can't turn on the CPU fan or still stop and turn down, you can detect 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, don't doubt it.

3. If it is a motherboard problem, you can discharge the motherboard first, empty the CMOS, the specific operation method: the host is powered off, remove the motherboard battery, put it back after about half a minute, and power it on.

4. If it can be turned on and will automatically restart, it is likely to be a problem with the system, but this problem is generally rare, and it generally appears on the old computer, you can try to reinstall the system to see if it can be solved.

Summary. Hello dear, the computer boot button, the fan stops after a few turns, and then it turns on normally, and the solution is as follows

Hello dear, the computer boot button fan stops after a few turns and then starts normally The solution is as follows: 1. The power supply is aging and damaged, which is often manifested as a fan that stops when it turns, and replacing the power supply can be solved. 2. The power switch is damaged. This is not common, 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.

Or static electricity. When upgrading the memory, pay attention to unplugging the power cord, and it is best to touch the radiator or the like to put 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.

Summary. Hello, dear, the first step, when you encounter the problem of the fan stopping and turning down, you should check the way the memory module is detected. Unplug one root and test the boot condition. If it can be turned on and won't restart, it's a memory problem, not memory.

The second step, the memory detection is no problem, or can't turn on the CPU fan or still stop and turn down, just detect 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 need to doubt it.

The third step, if it still can't be solved, consider the problem of detecting the motherboard, which is the protection function of the motherboard. If it can be turned on and will automatically restart,It's a problem with the system.,But generally this problem is relatively rare.,It usually appears on old computers.。 You can try to see if reinstalling the system can solve it.

The second problem solves the problem of the power supply of the newly bought computer, which causes the cup fan to stop and turn all the time, even if the memory is turned on, it will automatically restart. Changing the power supply solves the problem.

The computer pressed the power button and the fan stopped when it turned, and it couldn't be turned on.

Hello, dear, I am the Q&A Lord, I received your question, and I am sorting out the answer, please wait, I will reply to you within ten minutes.

Hello, dear, the first step, when you encounter the problem of the fan stopping and turning down, you should check the way the memory module is detected. Unplug one root and test the boot condition. If it can be turned on and won't restart, it's a memory problem, not memory.

The second step, the memory detection is no problem, or can't turn on the CPU fan or still stop and turn down, just detect 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 need to doubt it. The third step, if it still can't be solved, consider the problem of detecting the motherboard, which is the protection function of the motherboard. If it can be turned on and will automatically restart,It's a problem with the system.,But generally this problem is relatively rare.,It usually appears on old computers.。

You can try to see if reinstalling the system can solve it. The second problem solves the problem of the power supply of the newly bought computer, which causes the cup fan to stop and turn all the time, even if the memory is turned on, it will automatically restart. Changing the power supply solves the problem.