显示器没有信号输入的原因及解决（The reason why the monitor has no signal input and its solution）

显示器没有信号输入的原因及解决（The reason why the monitor has no signal input and its solution） 显示器没有信号输入的原因及解决(The reason why the monitor has no signal input and its solution) What happens when the monitor shows no signal input? Here are the reasons for the absence of signal input and solutions. When the display is blank when the image is displayed (but not currently available on the display in the host no signal is sent, the screen will display "no signal line"), first check the power plug whether good, the power of the fan is running? Is the power indicator light and the hard disk indicator flashing on the main panel? Because if the host power does not work or the motherboard does not supply power, the monitor will not show any image when it does not receive the signal. Check that the power supply of the monitor is plugged in properly If the power switch of your monitor is a touch switch, when you add power to the monitor, you should hear a slight "tap" sound, then you can judge the switch power circuit of the monitor is good. Is the power switch of the re display already open? Is the power indicator of the monitor on? When the hand close to the monitor screen and slowly move a "hissing" sound, while the hair on the hands were sucked up in this sense, check the display high voltage circuit is working properly. If the monitor has been powered up and has a high voltage, continue to check the display data line connector and the signal output interface of the video card, is it in good contact? Is it loose? Unplug the plug and check to see if there is a bend or break or a lot of dirt in the D interface. This is often encountered many user problems, in connection with D type sockets, uneven force, or forget the fixed screw interface, the interface to loose causing poor contact, or for the installation method of improper or excessive force, so that the D type interface within the needle or curved needle, resulting in poor contact. Note: the display of the data line plug 15 pins may be missing needle, such as 4,9, 11 needles, at this time normal, do not artificially use other wire to supplement these missing pins, so as not to cause other faults. Speak a little more now: 1,2, 3 pin for the red, green, blue three signal input, if the needle contacts which is not good, there will be a lack of corresponding color screen. If the 12,15 pin has problems, the host will not find the corresponding monitor, but this does not affect the use. If there is a problem with the 13,14 pin, the monitor will appear black screen, and the indicator light of the monitor will change from green to orange after the switch is switched on for a while. There is also one of the black screen. Open the case and check that the monitor card is properly installed Is it in good contact with the motherboard slot? Is the graphics card or slot too dusty for too long to contact? Whether the chips on the graphics card have scorch or crack marks. When the video card causes black screen, when the computer boot self test, there is a short, four long "beep" sound prompt. When the display card is installed, the upper half of the display card is held by hand, and the utility model is uniformly and forcibly inserted into the card slot, so that the fixed screw port of the video card is in conformity with the screw mouth of the main box. Do not correct when not inserted, resulting in distortion of video cards. If the installation is correct, you can remove the video card, wipe the pin of the finger with an alcohol cotton ball, or change a slot (only for the PCI card). If not yet, Can only change a good video card, try it. If not, in determining the integrity of the video card, but also to consider the compatibility of graphics cards and motherboards. Better check the relevant information or ask the net friend. Check whether other cards (including sound cards, decompression cards, video capture cards) are in good contact with the main board slot Check that the data line of the hard disk is connected with the power line of the hard disk, is it correct? Replace the slot for other cards and clean the pins. This point is often overlooked by many people. In general, the computer black screen is a monitor and graphics card problem, and other devices have nothing to do. In fact, the installation of the sound card and other equipment is not correct, leading to the early completion of the system difficult to complete, especially the hard disk data line and hard disk power line plug, easily lead to no display of the fault. Check that memory is in good contact with the motherboard Try to plug the memory in again, or try another slot, or replace the new memory bar. If there is a problem with memory, the computer will have a fast beep when it starts. The cue sounds are different depending on the motherboard. Check that the CPU is in good contact with the CPU seat on the motherboard CPU or SLOT1 socket or SOCKE370 socket contact is bad because of moving or other factors. It is better to press CPU by hand or remove CPU to reinstall it. Check the CPU FSB frequency memory frequency jumpers or CMOS settings are correct. The control board manual, check the relevant jumper, in order to "CPU FSB jumper -CPU frequency jumper jumper - memory frequency". Check that the voltage of the CPU is properly set. Be careful when setting the CPU voltage jumper, and must be consistent with the CPU's operating voltage. These two steps, eight and nine, should be carefully checked by some assembly machines or users who prefer overclocking to black screen. Check that the CMOS parameter settings are correct. If your computer has two graphics cards, you set the first PCI card in your CMOS, and your only monitor is on the AGP card. Of course, the monitor won't turn on. Check whether the working environment required by the host and monitor is consistent Is the operating voltage normal and the ambient temperature too high?. In addition to the inspection in accordance with the above procedure, can also according to the working condition of the computer to quickly locate, as in turn host power, you can hear a beep sound that computer automatically if the hard disk light flickered, it should be in the second step to the fourth step check. If the display contents are displayed on the computer boot process, just a black screen appears after the loading screen WIN98, which is WIN98 system software problems, the inspection method is based on the display itself has no electrical fault, open host power display the power light from green to yellow, but did not display a black screen image display. If the monitor is still not shown when using the above procedure, professional personnel should be maintained. In the process of inspection, be careful, a small problem will affect the output of the signal. Recommended reading: monitor the display of color maintenance, avoid and solve the computer boot black screen reasons and solutions summary