What is the reason why the display flashes black screen, and the LCD screen flashes black?

According to your description, there are many possible reasons for this phenomenon, I wonder if the power indicator of the display is still on at the moment when your computer screen goes black, and what is the picture that appears after the black screen?

1. The computer often has a black screen, but the power indicator of the display is on, and the black screen time is short, if the computer restarts after the black screen, then the power of the host power supply is too small, it is recommended to use some external devices at the same time, or change to a high-power power supply;

2. The computer often has a black screen, but it is good to manually go to the keyboard or mouse, and the desktop is still the same as before the black screen, it may be that the power time you set to turn off the monitor is too short, you can right-click the mouse button on the desktop, select "Properties", and set the time to turn off the power of the monitor in the "Power" item under the "screen saver".

3. If the screen is often blacked instantly, but the host power indicator has not been interrupted, and the black screen is still the same after the black screen, it may be that there is a problem with the circuit of the display, and it is generally common that the capacitor in the power circuit of the display is overcharged or the pins are soldered intermittently and the power is cut off, resulting in a black screen. It is recommended to send the monitor to the relevant department for warranty or repair.

Of course, there are many possible explanations for such phenomena, if the above explanations are not able to solve your problem, please describe the process of the phenomenon in detail, so that you can prescribe the right medicine and analyze the specific problem in detail.

Come, come, come

The main reasons are:

1. It may be that the display screen is blackened due to power failure, and you can check whether the power connection line has poor contact or whether the connection line is broken or aged; Troubleshoot and fix them one by one.

2. It may also be that there is a problem with the external signal input that causes the splash screen and black screen, mainly to see if there is a problem with the connection line, you can change the connection line and try to reconnect it.

3. If none of the above methods can be solved, it may be caused by the failure of the display screen, mainly the screen failure, the screen wiring failure, the solder joint desoldering of the internal circuit or parts, and the poor contact caused by oxidation, etc., which need to be solved by contacting the after-sales service for testing and maintenance.

If there is a problem with the picture tube in the monitor panel, you can replace it.

The screen goes black when the monitor flashes, which is caused by the leakage of the filter capacitor output of the low-voltage rectifier on the power board inside the monitor. When the display is powered on, because the filter capacitor of the low-voltage output part only leaks and fails, and is not completely necrotic, the output power supply is normal in a short time, so the screen lights up, and then the display goes out immediately due to insufficient power supply.

A display is also commonly referred to as a monitor. A monitor is an IO device that belongs to a computer, i.e., an input and output device. It is a display tool that displays a certain electronic file on the screen through a specific transmission device and then reflects it to the human eye.

It can be divided into various types such as CRT, LCD, etc.

If it is a newly installed computer, the first time it is turned on, the host is operating normally, but the monitor has no signal on the black screen, you first need to check whether the power of the monitor is turned on, whether the display is turned on, and you can look at the power indicator of the display.

If the memory is not plugged in properly, loose, or there is too much dust on the gold finger, it may also happen that the monitor screen is black and there is no signal, but the computer is running all the time. The solution is to turn off the computer and power it off, then remove the memory module, then clean up the gold finger, and then reinstall the memory, or try to install it in a different slot, and then turn it on.