Why does the computer screen go black for a second or two and then recover?

The reasons why the computer will recover after a black screen for one or two seconds are: 1. The computer power plug is loose; 2. The data connection cable between the display and the host is loose; 3. The graphics card is loose; 4. The fan is too dusty; 5. The CPU temperature is too high; 6. There is a problem with the motherboard's boot circuit; 7. The system is damaged; 8. The VGA video connection between the host and the monitor is in poor contact; 9. The gold finger of the memory or graphics card is oxidized.

The operating environment of this tutorial: windows10 system, DELL G3 computer

As technology becomes more and more developed, computers have become our Commonly used tools, we can use it to watch videos, chat, play games, etc. But after a long time, we sometimes encounter a situation where the computer screen suddenly goes black for a second or two and then recovers. Why is this? What harm does it do to computers? Today, the editor has brought you relevant tutorials. Friends who are interested can take a look. I hope it will be helpful to you.

1. Sometimes a black screen does not necessarily mean that the computer is broken. If the indicator light of the host is still on, you should first check whether the computer power plug is loose. It may be that the power plug is loose. caused.

2. If there is no problem with the power supply and the indicator light of the display is still on, then you need to check whether the data connection cable between the display and the host is loose. Condition.

#3. If neither of the above situations is true, then the graphics card of the desktop computer may be loose.

4. At this time, you need to prepare screwdrivers and cleaning tools, open the computer case, and check whether the graphics card fan can work normally. If the fan does not work due to dust, , then the graphics card will have a black screen due to excessive temperature. At this time, you need to clean the graphics card and reinstall it securely.

5. The reason why the CPU is slow and slow is because the fan automatically controls the speed. When the temperature is too high, it will speed up. When the temperature reaches the extreme, it will activate the over-temperature protection and shut down. In the final analysis, it is caused by poor CPU cooling. , check whether the silicone is applied well and whether the fan is installed in place.

6. Problems with the motherboard's startup circuit, such as clock, reset, power supply, MOS tube, etc., may lead to frequent black screens during use, as well as I/O, south bridge, etc. If there is a soldering problem, a black screen will appear frequently, so the motherboard needs to be repaired (if it is within the warranty period and after-sales service is provided).

7. After booting, you can see a black screen with English letters. This is related to the software. Generally, the system is broken, the master boot record is damaged, the partition table is damaged, the startup items are not set properly, resulting in a black screen at boot. . Reinstalling the system, rebuilding the master boot record, rebuilding the partition table, and resetting the first startup item can fix it.

8. It is possible that the VGA video connection between the computer host and the monitor is not in good contact (especially the interface is not plugged in properly), or there may be a problem with the VGA connection data cable. This will lead to frequent black screens, so you need to replug the connection data cable or replace the data cable.

9. The gold finger of the memory or graphics card is oxidized, resulting in poor contact between the memory and the memory slot, and poor contact between the graphics card and the graphics card slot, resulting in the inability to boot or a sudden black screen. Turn off the power, open the case, remove the memory and independent graphics card, use an eraser to rub the golden finger of the memory (that is, the part with the copper piece) on both sides, and then insert them back in. Use the same method for the independent graphics card. Once, then install the chassis and plug in the connections.

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