Why does my computer sometimes go black?

Poor contact with the data cable or power supply.

The computer has a black screen for a while, and it's fine for a while, and there are many reasons for this:

1.Faults caused by the host power supply.

Black screen failures caused by a damaged host power supply or poor host power quality are common. For example, when you add some new equipment, the display has a black screen bridge finch fault, after eliminating the quality and compatibility problems of accessories, the quality of the power supply is not good, and the lack of power is the main cause of the failure, at this time, you may also hear the horn in the machine alarm 12 consecutive sounds, replacing the high-power and high-quality power supply is the best solution to this kind of failure. In addition, some motherboards have ATX dual power connectors, and the wrong choice of jumper settings can also cause this kind of failure.

2.Faults caused by the quality of the accessories.

Poor quality or damage to computer accessories is the main cause of black screen failure of the monitor. For example, problems with the motherboard (and the motherboard's BIOS), memory, graphics card, etc., may definitely cause a black screen failure.

If the fault is orange, the replacement method is the fastest solution to replace the graphics card, memory, and even the motherboard and CPU.

3.The quality of the connection between the accessories.

The main cause of black screen failure is the incorrect or loose connection between the memory, graphics card, etc., and the motherboard. In addition, if the graphics card is connected to the monitor, it can also cause this kind of failure, up to the AT power plug in incorrectly, or even if your hard disk or optical drive data cable is reversed, it may also cause a black screen failure.

4.Black screen glitch caused by overclocking.

Overclocking or overclocking parts that are not suitable for overclocking will not only cause a black screen failure, but also damage to accessories in severe cases. In addition, excessive overclocking or overclocking parts that are not suitable for overclocking, poor heat dissipation, or damage to the dust of the cooling fan during normal use, not rotating at all, etc., will cause the system to protect itself and crash and black screen.

5.Black screen caused by other reasons.

Other things such as incorrect CMOS settings on the motherboard and incorrect BIOS jumpers on the motherboard can cause a black screen failure, in which case you can change the settings according to the motherboard instructions. In addition, software conflicts, such as driver problems, improper installation, improper DIY, such as BIOS flashing errors, incorrect power management settings, hardware damage caused by malignant viruses (such as CIH), etc., may cause the display to be black screen and early failure.

When you encounter this kind of failure, you may wish to think more carefully, consider the causes of the failure, and solve the failure, know yourself and the other, and get twice the result with half the effort.

The black screen glitch caused by the failure of the monitor itself is mainly caused by the following reasons:

1.The AC power supply is insufficient.

The external power supply is insufficient, causing some old displays or some displays with high power consumption to fail to start normally, which is one of the causes of the black screen failure caused by the failure of the display itself. Or the external power supply voltage is unstable, too high or too low may cause the display to not work.

2.The power switch circuit is damaged.

The failure of the display switch circuit is the main cause of the black screen failure of the display. Simple ones such as damaged power switch or internal short circuit; Common ones include damage to the switch or damage to its peripheral circuit components.

3.Damage to the output circuit.

The failure of the output circuit or picture tube and its power supply circuit is also the main cause of the black screen failure of the display. In particular, the damage of the high-voltage pack, which is more common in some miscellaneous displays that have been used for many years or are of poor quality, resulting in no display black screen failure.

Of course, this is only a problem with the monitor itself, if there are other problems, please tell us about it.

Is the light green or orange when your monitor screen goes black... If it's green, the liquid crystal is a high-pressure strip that has a problem. It's OK to change the high-pressure strip. I don't need to talk about the orange ones.

Look at the signal cable of the display, whether it is not in poor contact. And what graphics card are you using, if it's a 9400 graphics card, leave it alone.

It could be a relationship between your monitor or the power supply of your console.

If it is turned on, it is generally because the graphics card is too hot or the CPU is too hot, and the black screen cannot be turned on, generally because the memory or graphics card is in poor contact or the memory quality is a problem or a power supply problem or a poor CPU contact (no sound or beep sound when booting up, more than two tones are asked next week, and a short tick is normal).

Generally to reseat the graphics card and memory card, the main thing is to clean the dust near the CPU and memory, which is easiest to do - or replace the memory or graphics card or power supply.

The capacitor on the motherboard may be bursting, see if the capacitor near your computer's CPU (the capacitor erected like a keg) is bulging, the normal should be flat, buy a few of the same model in the electronic market, and change it for a few cents.

There is a possibility that the graphics card or CPU is too hot, check the fan.

If none of the above is the problem, it's a problem with the display.

Is there an alarm sound on the computer when it is turned on? It's best to remove the graphics card or memory module and wipe it with an eraser, sometimes because of dust. So it causes a sudden black screen or freezes.

The monitor or graphics card is broken.

Maybe it's because the display plug is loose, and I've encountered this kind of problem.

There may be a problem with the driver next driver wizard to give it a try.

Hello, this is a normal situation, nothing serious, it may be that the voltage is unstable, causing a temporary black screen, or it may be a situation that occurs when launching some games (such as QQ Xuanwu).