The computer always has a black screen, why does the computer always have a black screen

If reinstalling the computer doesn't work, it doesn't mean that your system is the problem. It may be that the memory module in your console is not plugged in securely or there is a lot of dust. You can unplug the memory module and wipe it gently, or use a small brush or hair dryer to clean it up, and be sure to clean it carefully.

If it still doesn't work, it may be that your graphics card is not secure or has been damaged, you can take it to the computer store and ask him to take a look at it for you. I've had a similar situation before, as soon as I touch the computer host, the computer will go black. Later, I found out that there was a lot of dust in the host, and it could run normally after cleaning it.

Finally, I wish you good luck and hope that you can solve the problem and get rid of the trouble.

If it's a desktop, it's probably a power issue! It is recommended to try a different power supply, and it should solve the problem.

There are too many reasons for the black screen, rule out viruses and software issues first. If it's an old machine, it's time to change it.

There is a conflict between the system and your memory.

The first is poor contact, if you encounter a problem, you must first check the poor contact, and the poor contact of the graphics card is one of the reasons why the graphics card cannot work stably.

The second is the power supply problem! This is also a relatively common but relatively unnoticed problem, often misjudged as another problem, often encountered when upgrading the machine, and the problem encountered when the CPU is upgraded, the original design of the circuit is often unable to cope with the power supply needs of the hardware equipment that appeared later.

The third is that the CMOS settings are not reasonable, no product in the world is perfect, and the same is true for hardware products. Graphics cards are evolving so fast that many new features and functions are not only not perfectly supported by our hardware systems, but also directly affect the stability of our computers.

The fourth is the hidden danger on the VGA plug! The VGA plug on the graphics card may cause the reed in the pinhole to become loose after multiple plugging and unplugging, so that it cannot make good contact with the male connector of the signal cable of the display; In addition, the violent pulling of the signal cable of the display may also lead to the signal transmission problem of the VGA plug. For the common 15-pin VGA plug pins correspond to red, green, blue three-color signals respectively, and its normal voltage fluctuation range is that the pins correspond to the line scan signal and field scan signal of the display respectively, for the line scan output signal, the voltage should be 3V 5V when working normally, and the field scan signal should not be higher than 1V.

If you violently operate on the VGA plug and the display screen goes black, and after measurement, you find that the output voltage of the pin of the VGA plug is abnormal, then you can basically conclude that there is a problem with the VGA plug. This is also a problem that causes some computers to change color, the solution is to encounter the situation that the reed inside the VGA plug is loose, you can use solder to thicken the pins on the male end of the monitor signal cable, so that the loose reed is in close contact with the display signal cable again. For the VGA pins that are found to have problems, you can follow the VGA plug to find the corresponding solder joints on the PCB board, find the open circuit, and repair the soldering again.

Guess you're the card for the ATI.

Install the graphics card patch, and also reduce the resolution of the display frequency.

This could be a configuration issue

It may also be that the graphics card is too long and can't be dragged away, so it's okay to shut down and rest.

If it is a virus, it is recommended to use antivirus software such as 360 or Keniu.

Check to see if your graphics card capacitor is broken, and if so, you can take it to the store to change the capacitor or replace the graphics card.