Why is the computer screen always black?

After using the computer for a long time, you may occasionally encounter one or two black screens. So what is the reason for the black screen on the computer? How to solve the problem of black screen on computer? Let’s take a look at the specific causes and their solutions.

1. Software problem.

1. Reasons for operating system settings, such as screen saver, power management, etc.

2. In addition, incompatibility of the display card driver will also cause a black screen on the computer, which can be solved by simply reinstalling the driver and debugging the system.

3. Of course, viruses may also cause a black screen. If the system suddenly enters the desktop after information startup, it may be caused by virus damage. The repair method can be to reinstall the system or perform system recovery.

4. Software conflicts. Due to the widespread expansion of PCs, PCs are very active. Thousands of companies have prepared various software. This may occur when installed together, resulting in address call conflicts. The solution to the black screen is very simple, which is to uninstall the software you just installed.

2. Hardware problems.

1. First of all, we must mention some very common but possibly overlooked situations, such as a loose monitor power plug, power outage, or poor VGA interface contact, or some minor faults in the monitor switch. Confirm that everything is correct. We will determine the hardware failure.

2. Heat dissipation problem: After the computer starts, enters the system normally and runs for a period of time (or uses it normally for a short period of time), a black screen suddenly appears. This situation is most likely caused by heat dissipation. Normal temperature is 30-50 degrees. When any part exceeds 50 degrees, the motherboard protection mechanism triggers and causes the computer to automatically shut down and restart. The solution is simple too. Add thermal paste or replace the heat sink.

3. Graphics card or display problems: These two devices account for a large proportion of black screen failures at computer startup. The replacement method is usually used to replace the monitor. If used normally, the original monitor is broken. If you replace the monitor or have a black screen and consider the host problem, it is usually easy to think of a graphics card problem. You can also replace the graphics card. If the display is normal, the graphics card is faulty.

4. Power supply issue: When assembling, we usually focus on the selection of CPU and memory, but we also need to ensure that the power supply provides enough power to all components. If there is a fault, the host will issue an alarm. Moreover, the monitor does not light up and occasionally does not say a word. After checking, it is also a power issue.

5. Motherboard problem: The main reason is CMOS setting error. The monitor is not connected to the first initialized PCI or onboard AGP graphics location. As a result, the host started normally and the display did not light up.

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