Win7 system computer boot cpu fan turn it down to stop how to do

1. Check if the power supply of the main unit is working

Is the power supply fan rotating? Move it to the air outlet of the switching power supply on the back of the main unit chassis by hand. If the wind blows out, the power supply is normal. Power failure; when the main power switch is turned on, is the three indicators (NumLock, CapsLock, and ScrollLock) of the keyboard flashing? Yes, the power is normal; if the power indicator and hard disk indicator of the main panel are on, the power is normal. Because the power supply is not normal or the motherboard is not powered, the monitor does not receive the data signal and obviously does not display.

2. Check if the monitor is powered.

Is the monitor's power switch turned on? Is the monitor's power indicator on? Is the monitor's brightness potentiometer turned off? Move to the monitor by hand. Does the screen have “咝咝” and “sound”, is the hair on the back of the hand erected?

3. Check if the display card is in good contact with the monitor signal cable

You can unplug and check the D-shaped socket. Whether there are bends, broken needles, and a lot of dirt in the middle is a problem that many users often encounter. When connecting the D-shaped socket, due to uneven force, or forgetting to tighten the socket fixing screw, the socket is not in good contact, or the D-shaped socket is broken or bent due to improper installation force, resulting in poor contact.

4, open the chassis to check whether the display card is installed correctly, and whether it is in good contact with the motherboard slot

Is the display card or slot too dusty due to too long use time, causing contact? Poor? Is there any burnt or cracking on the chip on the display card? When the display card causes a black screen, there will be a short and long “snapshot” when the computer is turned on. Try another good graphics card.

5. Check if the other boards are in good contact with the motherboard slot.

Check if the data cable and power cable of the hard disk are connected correctly. Replace the slots of other boards and clean. Pin. This is often overlooked by many people. In fact, due to the incorrect installation of sound card and other equipment, the system initialization is difficult to complete, especially the data cable and power cable of the hard disk are inserted incorrectly, and it is easy to cause no display failure.

6. Check if the memory module is in good contact with the motherboard, and the quality of the memory module is too strong.

Re-plug the memory module once, or replace it with a new one. If there is a problem with the memory module, the computer will have four consecutive sounds when it starts up.