What is the reason for the computer black screen?

For some older or assembled computers, a black screen is more prone to malfunction. Computer has a black screen hardware for a variety of reasons, such as display damage, video card damage, bad graphics card contact and so on. To eliminate the black screen, you should use a combination of elimination, replacement, the basic principle is to replace the most suspicious computer parts, you can follow the following steps to analyze the cause of the failure.

Computer black Screen Reason: Hardware Chapter

First, check whether the computer components are placed in a secure

First, check that the monitor cable is securely and reliably plugged into the host interface, and then check that the video card is in good contact with the motherboard I/O slot. If necessary, please remove the video card, re-placement, to ensure that the placement in place, good contact.

　Second, confirm the display is damaged

If the monitor and video card are securely installed, try a different monitor that confirms your normal display. If the screen is no longer black, the reason is that the monitor may be damaged.

　Third, confirm the fan is not a problem

If the monitor is not damaged, further check to see if the CPU fan is working. If the operation, the use of multimeter to measure voltage output is normal for ±12v, ±15V, if not normal can change a power supply to try.

　Iv. detection of CPU, video card and memory strips

If a black screen still appears, remove all components except CPU, video card, memory, and power up the computer. If the memory is faulty, there should be an alarm sound. If it is not memory reasons, please change to a normal CPU, power on re-detection. If the black screen still appears, you can only change a motherboard, the problem should also appear on the motherboard.

In addition to the hardware cause of the black screen phenomenon, there are the following three aspects of the "soft" cause may cause "black screen."

　Computer black screen reason: Software article

First, the hardware acceleration setting is too high

Hardware acceleration can make the software that handles a lot of graphics run smoother, but if the computer hardware acceleration is set too high, it can cause a "black screen" phenomenon. To resolve a "black screen" failure, first try to reduce hardware acceleration.

1, click the Windows Start menu, click Control Panel, and then double-click Show.

2. Select the Troubleshooting tab and, under Hardware acceleration, gradually drag the slider from full to a location close to none.

3. Click the OK button.

　　Second, disable 3D acceleration or upgrade graphics driver

If Windows is configured for 3D acceleration, but the video card does not support this feature, a "black screen" failure may occur when you run a game or multimedia program.

1. Click Start, click Run, and then type "DxDiag" in the Open box and press ENTER.

2. Select the Display tab, and under DirectX Features, click the test Direct 3D button to get the correct direct 3D functionality.

3. If a rotated cube does not appear in the screen, the video card does not support 3D acceleration. At this point, click the "Disable" button after "Direct 3D acceleration" to disable the feature.

If your video card does not support 3D acceleration, in addition to disabling this feature, you can also contact the graphics card manufacturer to update the driver so that it supports 3D acceleration for DirectX.

　Third, the driver of the graphics card is incompatible with the video card

The DirectX installer may incorrectly detect the video card and install drivers that are not properly driver, verify that the graphics driver you are using is correct.

1. Click Start, click Control Panel, and then double-click System.

2. Select the Hardware tab, click the Device Manager button, and then click the + sign before the display card or display adapter, right-click the display adapter under it, and then click the Properties button.

3. Select the Driver tab and click the Driver Details button to display the graphics driver you are using. If you are using a driver that is not compatible with the video card, in the Drivers tab, click the Update Driver button, and then follow the onscreen instructions to install a new version of the driver for the video card.

Through the above we introduce the soft and hard dafa, basically can cope with most of the black screen situation, if one day everyone's machine encountered misfortune, may wish to take out to try.