php Editor Banana, it may be confusing for you when your motherboard does not have a fault light coming on. The fault light is usually used to indicate problems happening on the motherboard, but if it doesn't come on, then you may need to take other methods to diagnose the problem. First, make sure all power connections on the motherboard are correct. Then, check other lights on the motherboard, such as the power light and hard disk light, to see if they are working properly. Additionally, you can further troubleshoot the problem by checking BIOS settings and using diagnostic software. If you still cannot resolve the issue, it is recommended that you seek professional help to ensure that your motherboard is functioning properly.
1. Turn on the power supply and check whether the power fan is rotating. If the power supply fan is not spinning, the power supply is faulty.
2. Re-plug the 20P power cord that supplies power to the motherboard from the computer. The computer won't turn on and the motherboard light doesn't turn on. Is the motherboard broken?
3. If the motherboard still does not respond after being turned on by unplugging and plugging, it means there is a problem with the motherboard.
4. If it still doesn’t work, it is recommended to go to a repair shop for repair or replacement
1. CPU_FAN (cooling fan power socket) pin 1 (ground pin), pin 2 (12V), pin 3 (speed detection pin), pin 4 (speed control pin) 2. CPU_OPT ( Water cooling fan power socket) Pin 1 (ground pin), pin 2 (12V/speed control pin), pin 3 (speed detection pin), pin 4 (VCC) If an air-cooled radiator is used, plug the radiator into At CPU_OPT, you will find that the COU optional fan display speed in the motherboard BIOS will change when adjusting the CPU_FAN speed, and there is no option to turn it off.
The main performance of the fan is reflected in the following aspects: rotation speed, blade shape, blade angle and bearing system. Generally, the fan speed is indicated on the radiator manual. Generally speaking, 30% of the cooling effect of the radiator depends on the speed of the fan.The power supply is normal, but the motherboard is not powered on. The faulty part is usually the motherboard.
1. To determine whether it is a power problem, first unplug all the cables connected to the motherboard.
Find a paper clip.
Find a set of 24-pin (some are 20-pin) cables on the power supply, and find the green wire and the black wire. There is only one green wire and there are several black wires. Choose one close to the green wire. Just use any of the black ones!
Insert one end of the U-shaped paper clip into the green hole, and the other end into any black wire hole next to the green wire.
After inserting the paper clip, you can now connect the power cord and start powering on.
If the fan of the power supply is spinning at this time, it is basically possible to determine that there is no problem with the power supply.
If the fan of the power supply does not rotate, you can basically judge that there is a problem with the power supply and you need to replace the power supply and test it.
2. After detecting that the power supply is normal, use the power supply and the motherboard to turn on the computer separately. Use a screwdriver to short-circuit the power SW pin on the motherboard.
At this time, the motherboard is powered on and the power supply fan will rotate. Then, Add memory, graphics card, hard disk, and connecting cables at one time until the fault recurs and you can find out the faulty part that caused the motherboard to not power on. If the motherboard still does not power on, then the faulty part is the mainboard.
The reasons why the welding machine fan does not rotate are as follows:
1. The temperature does not reach the point where the fan rotates.
2. The power cord of the fan is broken or falls off.
3. The fan has burned out.
4. The fan of the welding machine is not running. Even if it can be welded, it is not allowed to be used.
5. The welding machine is not allowed to operate while sick, including the cooling fan. Poor heat dissipation for a long time will burn the welding machine and even cause an explosion accident.
6, the startup capacitor is broken
There is no text on the display. Has the memory been stored? The CPU fan must be aligned with the CPU FAN interface. Do not change the sys fan casually. Detach the motherboard's button battery for a minute and then put it back on again. If these still don't work, consider the possibility of a CPU problem. The CPU fan may not work for a long time, which may cause the CPU temperature to be too high and burn out. However, you have to find a way to test whether this is the problem. You can take it to a repair place and ask someone to replace the CPU. Try it.
The CPU is connected to the CPU FAN position because the CPU FAN has an automatic speed adjustment function that can automatically adjust the speed to reduce noise when the temperature is low. SYA FAN is a socket for managing the temperature of the north and south bridges. If the motherboard temperature is too high, SYS_FAN fan It will run quickly. You can go to the motherboard BOSS program to adjust the fan speed so that the water pump runs at the appropriate speed.
Generally this situation is caused by oxidation or poor contact of the memory gold finger. If you encounter this situation:
1, first unplug the computer power cord and press the power button on the chassis 5-6 times. Release the residual charge on the motherboard.
2, then open the side panel of the chassis, insert and remove the memory slots.
3. Remove the CMOS battery from the motherboard and reinstall it after 1 minute. If your computer has a separate graphics card, it is best to plug and unplug the graphics card. After completing the above operations, power on the computer again. The fault still requires booting using the minimum system method: (power supply, motherboard, CPU memory, graphics card, monitor). At this time, you should normally see the display content, and a prompt such as the hard disk or keyboard cannot be detected will pop up. You can enter the bios, and the buzzer will not beep abnormally. If it is abnormal, the display may not display (or the screen may be blurry) or the buzzer may sound abnormally. (1) Memory problem a. The problem itself. It doesn't work in any slot, nor on other machines. Then the only option is to replace the memory. The buzzer usually makes an abnormal sound. b. Compatibility issues. Other machines can be used, but not this one; or a single cord can be used, but two cords cannot be used. Replace the memory. (2) Monitor/graphics card problem a. Connection problem. Check whether there are broken needles or short circuits. b. The graphics card itself is damaged. c. The display is damaged (very unlikely) b. Motherboard problem. The graphics card slot or related control circuit is faulty. At this time, the only solution is to replace the motherboard.
If the motherboard is not connected to the CPU, the CPU fan will still spin. The CPU is a high-heat device. In order to ensure the safety of the CPU, the fan is usually turned on first.
There are also two types of CPU fans, those with intelligent speed adjustment and those without intelligent speed adjustment. When the motherboard starts up, the BIOS program does not start running, and the CPU is at the highest speed stage. After the BIOS starts running, the speed can be adjusted intelligently. If the CPU is not turned on, the BIOS cannot run and the fan is always at the highest speed.
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