computer black screen is a relatively easy phenomenon, especially in some older computers or assembled computers. There are many reasons for the failure of the computer black screen, such as damage to the monitor, damage to the motherboard, damage to the graphics card, poor contact of the graphics card, power supply damage, cpu damage, and high component temperatures. There are also some artificial black screens, such as Microsoft China's genuine verification. However, most of the black screens are caused by a fault in a certain part of the computer, such as damage to the hard disk, damage to the motherboard or graphics card, etc. The following are nine solutions for the black screen failure of the display to help you comprehensively Understand.
1. Check the power of the host and work normally. First, determine if the host system has received power supply by looking at the power indicator of the main unit chassis panel and whether the power supply fan is rotating. Secondly, use a multimeter to check whether the external voltage meets the requirements. If the voltage is too high or too low, it may cause overvoltage or undervoltage protection of the host power supply. In addition, it is important to check the quality of the power switch and reset button and the correct connection between them and the motherboard. Because the power switch and reset button on many inferior chassis often occur after several times of use, it will cause damage. The black screen of the machine is not displayed. If the power supply is damaged, you can solve the problem by replacing the power supply.
2, check if the display power is connected. When the monitor is powered up, there is a sound of “嚓” and the power indicator of the display is on. When the user moves to the monitor screen, there is a “咝咝” sound, and the back of the hand is erected.
3, check whether the display signal line and the display card are in good contact. If there is a lot of dirt at the interface, broken needles and other damage will lead to poor contact and the display will be black.
4, check whether the display card and the motherboard are in good contact. If the display is black and the speaker inside the main unit emits a short beep, it indicates that there is a problem with the connection between the display card and the main board, or there is a problem with the connection between the display card and the display. It is important to check whether the slot contact is good. If there is any foreign object in the slot, change the display card to a motherboard slot for testing to determine if there is a problem with the slot.
5, check whether the display card can work normally. Check whether the chip on the display card can burn, the crack marks and the cooling fan on the display card work, and the heat dissipation performance is good. Change to a working card to check if the card is damaged.
6, check the memory board and the motherboard is in good contact, the quality of the memory is too strong. If the computer starts up with a black screen and the host emits a continuous beep, it indicates that there is a problem with the memory module. You can focus on checking the installation and contact of the memory and the memory slot, re-plugging the memory module once, or replacing the new memory module.
7, check whether the fan inside the chassis is rotating. If the cooling fan inside the chassis is damaged, it will cause poor heat dissipation. In severe cases, the CPU and other components may be damaged or the computer will automatically stop and protect, and an alarm sounds.
8, check other boards (such as sound card, decompression card, video, capture card) and the motherboard slot is good and the driver signal cable is connected correctly. This is often overlooked by many people. It is generally believed that the black screen of the computer is a problem in the display part, and has nothing to do with other devices. In fact, due to the incorrect installation of sound card and other equipment, the system initialization is difficult to complete, especially the data line interface of the hard disk, and it is easy to cause no display failure.
9, check whether the CPU is overclocked, the CPU is in good contact with the motherboard, and the CPU cooling fan is intact. If overclocking results in a black screen, then the CPU will jump back to the original frequency. If the contact is poor, remove the CPU and reinstall it, and use a high-quality high-power fan to dissipate heat from the CPU.
The black screen of the display is a common problem, and some monitors will prompt no signal, which can be attributed to the black screen of the display. In the face of the black screen of the display, we can check whether it is a problem in its own right. The two aspects are the power-on status of the display and the unpowered state of the display.
All the problems in the computer are needed to find out the reason, and as long as the correct cause is found, it will be easier to solve it. The nine situations and solutions of the computer black screen mentioned above can be Let you easily understand the cause of the black screen failure, and get it resolved in time, so quickly collect the above methods, and you will definitely use it later.