What about the computer's black screen?

A black screen on a computer monitor is a problem that users often encounter when using a computer. In fact, as long as the computer hardware in the motherboard, CPU, memory, display cards and other major parts have a certain understanding, the failure of the simple components of the fault can be completely removed from their own hands. In this case, you can follow the following maintenance steps and methods for analysis and simple maintenance:





1. Check that the host power supply is working




Does the
power supply fan rotate? Hand to the main chassis on the back of the switch power supply outlet, feel the wind blowing out the normal power supply, no wind is a power failure. For the current ATX power supply, it is possible that the power supply cannot be started because of a motherboard failure. Host power switch on the instant keyboard three LEDs (Num lock, Caps lock, Scroll lock) shiny? Yes, the power supply is normal; is the host panel power led, hard drive light lit? Light, the power supply is normal. If the power supply is not normal or the motherboard is not powered, the monitor does not receive data signals, there will be no display.





2. Check the monitor for power




is the power switch on the
monitor turned on? Is the monitor's power led lit? is the high voltage circuit of the monitor normal (does the hand move to the monitor screen have a "hissing" sound, or is the dorsal hairs erected)? If the monitor is black but the monitor power LED is green (normal), check the brightness and contrast of the display to see if the potentiometer is kept to a minimum.





3. Check whether the display card is in good contact with the monitor signal line





if the host power supply lights appear normal after the boot, but the monitor black screen has no display, and the Display power indicator yellow (not normal), you can turn off the computer and then unplug the VGA plug check, plug whether there is a broken needle or bending, this is a lot of users often encounter problems. In connection with the VGA plug, due to uneven force, or forget to tighten the socket fixing screws, so that the socket contact is bad, or because the installation method improperly forcibly through the Ambassador Plug needle or bent, so that contact bad 3lian.com





4. Open the chassis check to see if the card is properly installed and have good contact with the motherboard slot





display card or slot because of too long use time and dust too much, resulting in poor contact? Does the chip on the card have a burnt or cracked mark? The computer post will have a long, two-beep beep when the display card causes a black screen. When installing the display card, you should hold the upper part of the display card by hand and insert evenly into the groove, so that the fixed screw mouth of the display card matches the screw mouth of the main engine box, do not insert without forcibly fixing, lest cause the graphics card distortion. If you confirm the installation is correct, you can remove the display card by rubbing the pins with an alcohol sponge or by switching to a slot for installation. If not, change a good video card to try it.





5. Check if other boards (including sound card, Modem, hard disk, CPU, etc.) are in contact with the motherboard slots





Note Check the hard drive data cable, power cord connection is correct? Replace other card slots and clean pins. This is a point that many people tend to overlook easily. It is generally believed that the computer black screen is part of the problem of the monitor, unrelated to other devices. In fact, because the sound card and other equipment installation is not correct, resulting in the system initialization difficult to complete, especially the hard disk data line, power line plug wrong, but also easy to cause the failure of the display.





6. Check the memory bar and the motherboard contact is good, the quality of the memory is excellent





reseat the memory strips, or replace the new memory or memory slots. If there is a problem with the memory bar, the computer will have a continuous "beep" sound when it starts.





7. Check the CPU's contact with the motherboard is good





due to moving or other factors, so that the CPU and slot 1 socket or socket 7 socket bad contact. Use your hand to click the CPU or remove the CPU reinstall. As the CPU is the main engine of the heat, socket type 7 may cause the motherboard to bend, deformation, can be in the CPU socket motherboard Bottom cushion flat motherboard.





8. Check the motherboard bus frequency, system frequency, DIMM jumpers are correct





against the motherboard manual, check each jumper, order for "system frequency jumper--cpu frequency jumper--dimm frequencies jumper", set the CPU voltage jumper should be careful, should not be set too high. This step is useful for some assemblers or users who like to overclocking.





9. Check the parameter settings.





check that the CMOS parameter settings are correct and that the system software is set correctly. Check that the video card is in good compatibility with the motherboard. It's best to check the data for setting up.





because of frequent modification of CMOS parameters, or the damage of the virus to CMOS parameters, the CMOS parameters are often confused and difficult to recover. The CMOS parameters can be reset by using the CMOS discharge method and using the system BIOS default setting value. The CMOS discharge method can refer to the motherboard specification. If due to virus damage, reset the CMOS parameters, you must also antivirus to the hard disk.





10. Check whether the environmental factors are normal, whether the voltage is unstable, or the temperature is too high.





In addition to the above steps to check, can also be based on the work of the computer to quickly locate, such as the host power, you can hear the computer self-test completed, if the hard drive lights flashing continuously, should be in the second step to the fourth step of inspection. (video card, etc. caused by the display problem)