Of course, whether it is hardware failure or software problem, it is not isolated in a sense. Try to solve it according to the following ideas, and I believe that the black screen will be properly solved soon.
Black screen injury
When the "black screen" suddenly appears after the computer is turned on, please pay attention to whether there is an alarm sound in the PC speaker in the computer first. If the PC horn gives an alarm sound, then we can initially determine the hardware parts that may have problems according to the length of the sound. For example, if the alarm sound of PC horn is one long and four short when the computer is turned on, it can be easily judged that the problem is on the display card according to this prompt. If so, the reader can open the case and see if his display card is firmly inserted. If you feel a little loose, please pull out the display card, insert it again, insert it tightly, and then fix it with screws.
If the problem of insertion method is eliminated and the card slot is relatively firm, you can pull out the display card and try another slot on the motherboard. If the user's display card does not belong to PCI but is a new AGP slot board, and there is only one AGP slot on the computer motherboard, you can try another AGP slot on the motherboard to eliminate the physical failure of the display card. If the display card is inserted tightly and the physical failure is eliminated, there is another possibility that the "golden finger" of the display card itself has problems in normal contact. If this is the case, you can pull out the display card again, and then find a clean rubber to rub it back and forth on the "golden finger", because most of the poor contact problems of this "golden finger" are caused by some dirty things on it.
If the alarm sound of the PC horn is not a long one but a short one when the computer is turned on, but a short and urgent call, and there is also a black screen, then it can be roughly judged that there is a contact problem in the memory of your computer according to the phenomenon. The solution to poor contact is basically the same as the display card, that is, pull them out and then insert them again. Be sure to insert them to the end when inserting them, and fasten the clips on both sides of the memory slot.
SDRAM slots on some motherboards are more troublesome, because the slots on these motherboards are mostly made very tight. If users encounter this situation, they must not use force. They can hold the bottom of SDRAM slots on the motherboard with their fingers, then press down the memory with their thumbs, and prove that the memory has bottomed out after hearing a slight noise. Finally, they can fix the memory with clips.
There are still some black screen phenomena, and the computer will not give an alarm. At this time, the simplest thing is to analyze the specific problems according to the mathematical "exclusive method". First, check whether there is any problem with the power terminal board, remove the relevant supporting parts of the computer and put on some other equipment that can be used to check whether the power terminal board works normally. If there is nothing wrong with the power terminal board, then check whether the connection between the computer power supply and the motherboard is normal according to the normal procedure, that is to say, check whether the motherboard power supply is normal.
If the socket is not connected incorrectly, you should check whether the power supply is burned. If the power supply is burned, the power fan will also stop running. In some early computer cases, the power supply is often insufficient. If this problem is suspected, please unplug all the power cords of hard disks, optical drives and floppy drives, and then restart the computer. After the power consumption rate is greatly reduced, see if this situation is solved. If the problem still cannot be solved, please rule out that the motherboard BIOS is accidentally damaged by viruses such as CIH, and whether the motherboard has poor contact or short circuit of welding head.
In addition to the above, with the continuous improvement of the main frequency speed of CPU, the power supply plays an increasingly important role in the whole PC power system. Some people describe the CPU as the heart of a computer. Maybe for a long time, we are too concerned about whether the heart is healthy and powerful, but we ignore the chassis power supply that can provide power and energy for the heart. However, due to the insufficient power of the power supply, it may also cause the black screen phenomenon of the computer. The symptom is that after starting, you can hear the chassis power fan start normally, and you don't hear the "drip" sound of the system error, but the machine doesn't work, and there is no self-test process, and the display is black. If all boards and memories are plugged and unplugged again after the power supply is cut off, and it is confirmed that all boards or components are not loose, it is mostly caused by insufficient power supply.
I strongly believe that for the sake of your love for the health of your computer, don't neglect the chassis and power supply when buying a computer. Buying a power supply with a rated power of more than 250 watts is a kind of care for your machine. There is one more thing to note here. At present, many power supplies with rated power of 250W on the market can't meet the requirement at all, which leads us to another suggestion. Try to take care of famous brands when buying power supplies. Brands are a powerful guarantee for your machine safety at this time. If you have more peripherals installed on your machine, such as double disk, dual CPU, dual CD-ROM, SCSI card or something else, you'd better find a more powerful (300 ~ 400 watts) or server power supply. As for those P4, Thunderbird and GeForce3 users, they must use more than 300 watts of power, otherwise, things more troublesome than black screens will emerge one after another.
Soft and bad black screen
Of course, the phenomenon of black screen is mostly caused by the hard injury on the PC, but it is not absolutely so. Soft injury may sometimes deceive users more easily. In the process of using our computer, some black screen phenomena may also be soft failures after entering WINDOWS 98/WINME/WIN2000 or even WINXP system (but I haven't found the black screen failure of WINDOWS XP yet, but since there is no conclusion, we can assume that it also exists).
If users find that after the machine is assembled, there are always inexplicable problems in the process of installing software such as operating system, and even sudden black screen crashes. Here, it is necessary for us to eliminate the cause of the virus, because there are many cases of black screen caused by viruses in the system operation, but the only solution is to kill the virus, and there is nothing to say. On the contrary, we should pay more attention to the error or black screen in the operation of the program. The most obvious thing here is the program failure caused by the hardware driver problem. This kind of problem frequently occurs on some third-party boards such as 3D accelerated display cards, PCI sound cards, network cards, SCSI cards and RAID cards, and the most obvious manifestation of this kind of problem is that applications and game software frequently crash during operation, resulting in black screens.
For example, when playing Dungeon Guardian II, S3' s DIAMOND VIPER 770/GEFORCE 2PRO acceleration display card is often rejected by the game (the display card is not recognized), and even the game will give up hardware acceleration and switch to software effects. This paper analyzes the reasons for this problem, mainly because the power of standard 3D acceleration chips or higher-end, newer non-mainstream 3D acceleration chips is ignored when the game source program is written, so the game itself is not satisfactory in hardware support, which also affects the performance of the product. Another example is PCI sound card, PCI network card, etc. Because of the conflict between the driver and the system application, the machine suddenly appears black screen or restarts. Readers can solve this problem by installing an updated driver.