Diagnostic process for display black screen failure

Recently in the maintenance work often encountered the display black screen failure, some just a boot on the black screen, some in the process of using the monitor suddenly black screen. This black screen failure, there may be the cause of the display, the cause of the video card, or the reason for the motherboard, or even the simplest is not connected to the VGA video signal connection line reasons.

For the monitor black screen no image display this problem, I collected some online processing methods for everyone to learn.

The first step:

When the monitor black screen no image display, first check the host power is plugged in good? Does the power supply fan turn? is the power indicator on the motherboard, the hard drive light flashing?

Because the host power does not work or the motherboard does not have power, the monitor will not receive the signal, of course, there is no image display.

Step Two:

Check that the monitor's power is plugged in well? If your monitor's power switch is a light touch switch, when you add power to the display, you should hear a slight "popping" sound, then you can judge the display switch power supply circuit is good.

Check that the power switch on the monitor is turned on? Is the power led on the monitor lit? When the hand is close to the display screen and slowly move whether there is a "hissing" sound, while the hair on the hand has a feeling of being sucked, this in check the monitor high voltage circuit is working properly.

Step Three:

If it is determined that the display has been power-up and is high-voltage generated, continue to check that the monitor's data cable connector and the graphics card signal output interface is good contact? Is there any loosening? Unplug the Plug and check to see if there is a bent or broken needle in the D-connector or a lot of dirt.

This is a lot of users frequently encountered problems, in connection with D-type socket, force uneven, or forget to tighten the interface of the fixed screw, so that the interface loose caused by poor contact, or due to improper installation method or force too large, so that the D-type interface has broken needle or bent needle, resulting in poor contact.

Fourth Step:

Open the chassis check that the monitor card is installed correctly? Is it in good contact with the motherboard socket? Is there too much dust in the video card or slot due to the long use time, resulting in poor contact? Does the chip on the video card have any scorch or cracking marks?

When the video card causes a black screen, the computer post with a short four-long "beep" sound hint. When installing the display card, you should hold the upper part of the display card by hand and insert the card slot evenly and firmly so that the fixed screw port of the video card matches the screw port of the main box. Do not force fixed when not plugged in, resulting in distorted graphics.

If you are sure that the installation is correct, you can remove the video card with an alcoholic cotton swab to wipe the pin's gold finger or replace a slot (only for PCI graphics) installation. If not, you can only change a good video card to try.

If not, consider the compatibility of the graphics card with the motherboard when determining if the graphics card is intact. Better check the relevant information or ask the Netizen.

Fifth Step:

Check that other board cards (including sound cards, decompression cards, video capture cards) are in good contact with the motherboard's slots? Note Check that the data cable of the hard drive and the hard drive are the correct power cable connection method? Replace the slots of other cards and clean the pins.

This is a point many people tend to overlook. It is generally believed that the computer black screen is a display and graphics problem, independent of other devices. In fact, because the sound card and other equipment installation is not correct, resulting in the initial system is difficult to complete, especially the hard disk data cable and hard disk power line interpolation error, easy to cause no display of the fault.

Sixth step:

Check that the memory strips are in good contact with the motherboard? Reseat the memory bar once or replace it with a slot, or change the new memory bar. If there is a problem with the memory bar, the computer will start with a continuous "beep" sound. The beep will vary depending on the motherboard.

Seventh Step:

Check that the CPU on the motherboard is in good contact with the CPU holder? Due to moving or other factors, so that the CPU and SLOT1 socket or SOCKE370 outlet poor contact. It is best to press the CPU by the hand or remove the CPU and reinstall it again.

Eighth Step:

Check for CPU FSB, octave, frequency of memory, etc. jumpers or the settings in CMOS are correct. Check the relevant jumpers in the order of "CPU FSB jumper-CPU jumper-memory frequency jumper" against the motherboard manual.

Nineth Step:

Check that the CPU voltage is set appropriately. Be careful when setting the CPU voltage jumper, and be sure to match the operating voltage of the CPU. Eight and nine of these two steps for some assembly machines or like overclocking users should be carefully examined when a black screen appears.

Tenth step:

Check that the CMOS parameters are set correctly. If your computer has two video cards, you set the first PCI graphics card in the CMOS, and your unique monitor is attached to the AGP card, of course the display will not be lit.

11th Step:

Check that the working environment required by the host and monitor is compliant? Operating voltage is normal, the ambient temperature is not too high and so on. In addition to the above steps to check, but also according to the computer's working condition to quickly locate, such as the power on the host, you can hear the "beep" to the completion of the computer self-test, if the hard disk light is flashing continuously, then the second to fourth step check.

The above 11 kinds of inspection methods are based on the display itself without electrical failure, that is, the power supply led on the monitor from green to yellow but the monitor black screen no image display. If the display is still not displayed using the above steps, please ask the Professional to repair ~

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Diagnostic process for display black screen failure