The black screen of the monitor after booting, no display, is a problem often encountered by many computer users. In fact, as long as you have a certain understanding of the working principle of the computer, these simple faults that are not damaged by the device can be completely eliminated by yourself. Here's how to deal with the black screen of the computer boot monitor.
The reason why the computer boot monitor has a black screen
1. The computer boot monitor has a black screen. When there is no image display on the monitor black screen (but the monitor on the market currently has no signal sent from the host, the screen will display “No signal cable connectionâ€). First check if the host power is plugged in well. Is the fan of the power supply rotating? Is the power indicator and hard disk indicator on the panel of the main unit flashing? Because if the main unit power supply is not working or the main board is not powered, the display will not display images when no signal is received.
2, the computer boot monitor black screen, and then check the monitor's power supply is plugged in well? If your monitor's power switch is a tact switch, you should hear a slight “distraction†when you power up the monitor, and you can tell if the monitor's switching power supply circuit is good. Is the power switch of the display already turned on? Is the monitor's power indicator light? When the hand is close to the monitor screen and slowly moving to see if there is a "beep" sound, and the hair on the hand has a feeling of being sucked up, it is checking whether the display high voltage circuit is working properly.
3. The computer boot monitor has a black screen. If it is determined that the monitor has been powered up and there is high voltage, continue to check whether the data cable connector of the monitor and the signal output interface of the graphics card are in good contact? Is there any loose? Then unplug the plug and check if there is any bending or broken needle in the D-type connector or there is a lot of dirt. This is a problem that many users often encounter. When connecting the D-type socket, the force is not uniform, or forget to tighten the fixing screws of the interface, so that the interface is loose and the contact is poor, or the installation method is improper or the force is too large, so that the D type There is a broken needle or a bent needle in the interface, resulting in poor contact.
Note: The 15 pins of the data cable plug of the monitor may have missing pins, such as 4, 9, and 11 pins. Normally, do not artificially use other wires to supplement these missing pins to avoid other malfunctions.
Let me say a little more: 1, 2, and 3 pins are red, green, and blue. The three screens are input. If the needle is not in good contact, the screen will be missing the corresponding color.
If there is a problem with the 12th and 15th pins, the host will not be able to find the corresponding display, but this does not affect the use.
If there is a problem with the 13th and 14th pins, the display will have a black screen and the indicator light will change from green to orange after a while. There is also one of the above black screens.
4, the computer boot monitor black screen, open the chassis to check whether the monitor card installation is correct? Is it in good contact with the motherboard slot? Is the graphics card or slot too dusty due to too long usage time, resulting in poor contact? Whether the chip on the graphics card has signs of burning or cracking. When the black screen is caused by the graphics card, there is a short four-long “beep†sound when the computer is powered on. When installing the display card, hold the upper part of the display card with your hand and insert it evenly into the card slot so that the fixing screw opening of the graphics card matches the screw opening of the main chassis. Do not force the fixing when it is not inserted, causing the graphics card to be distorted. If you confirm that the installation is correct, you can remove the graphics card and wipe the gold fingers of the pins with an alcohol cotton ball or change the slot (only for PCI graphics cards). If it still doesn't work, you can only try a good graphics card.
If it still doesn't work, consider the compatibility of the graphics card with the motherboard when determining that the graphics card is intact. It is best to check the relevant information or ask the netizens.
5, the computer boot monitor black screen, check other boards (including sound card, decompression card, video capture card) and the motherboard slot is good contact? Pay attention to check whether the data cable of the hard disk and the power cable of the hard disk are connected correctly? Replace the slots of the other boards and clean the pins. This is often overlooked by many people. It is generally believed that the black screen of the computer is a display and graphics card issue, and has nothing to do with other devices. In fact, because the installation of the sound card and other equipment is not correct, the initial system is difficult to complete, especially the data cable of the hard disk and the hard disk power cable are inserted incorrectly, which is easy to cause no display failure.
6. The computer boot monitor has a black screen. Is the contact between the memory module and the motherboard good? Re-plug the memory module once or try another slot, or replace it with a new one. If there is a problem with the memory module, there will be a continuous squeaking sound when the computer starts up. The tone will vary depending on the motherboard.
7. The computer boot monitor has a black screen. Is the CPU contact with the CPU socket on the motherboard good? Poor contact between the CPU and the SLOT1 jack or the SOCKE370 jack due to movement or other factors. It is best to press the CPU by hand or remove the CPU and reinstall it.
8, the computer boot monitor black screen, check the CPU FSB, multiplier, memory frequency, etc. Jumper or CMOS settings are correct. Check the relevant jumpers one by one according to the motherboard manual, in the order of "CPU FSB jumper - CPU multiplier jumper - memory frequency jumper".
9, the computer boot monitor black screen, check whether the CPU voltage is set properly. Be careful when setting the CPU voltage jumper, and be sure to match the operating voltage of the CPU. The eight and nine steps are carefully checked for some assemblers or users who like overclocking when a black screen appears.
10, the computer boot monitor black screen, check whether the CMOS parameter settings are correct. If your computer has two graphics cards, you set up the first PCI graphics card in CMOS, and your only monitor is connected to the AGP graphics card. Of course, the display will not light up.
11. The computer boot monitor has a black screen. Check whether the working environment required by the host and the monitor is consistent. Is the working voltage normal and the ambient temperature is too high? In addition to checking according to the above steps, you can also quickly locate according to the working condition of the computer. For example, after turning on the power of the host, you can hear the “嘀†sound indicating that the computer self-test is completed. If the hard disk indicator flashes continuously, It should be checked in the second step to the fourth step.
12, the computer boot monitor black screen, if the display has content display during the computer startup process, only when the black screen appears after loading the WIN98 screen, this is only the WIN98 system software problem,
The above inspection method is based on the fact that the display itself has no electrical failure, that is, the power indicator of the display turns from green to yellow after the main power is turned on, but the display has no image display on the black screen. If the display still shows no display using the above steps, you should ask a professional to repair it.
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