Processing methods and steps of computer black screen

computer black screen processing methods and procedures:

1. Check that the host power supply is working

Does the power supply fan rotate? Hand to the main chassis 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 blink of an instant keyboard three LEDs (Num lock, Caps lock, Scroll Lock) are you flashing? Yes, the power supply is normal; the host panel power led, hard drive light is on, the power 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 to see if the power is added

is the power switch on the monitor turned on? Is the monitor's power supply light on? Is the monitor's High-voltage circuit normal (by hand to the monitor screen whether there is a "hissing" sound, the dorsal hairs are erected)? If the monitor is black but the monitor power led appears green (normal), So check the brightness and contrast of the display. is the potentiometer closed to the minimum?

　　3. Check the display card and monitor signal line contact is good

If the power supply lights after the boot is normal, but the monitor black screen does not have any 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 due to improper installation method forcibly through the Ambassador plug broken needle or bending, resulting in poor contact and so on

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

Does the display card or slot have too much dust to be used for too long, resulting in poor contact? Does the chip on the card display a burnt or cracked mark? When a black screen is caused by a display card, the computer will have a two-and-a-minute beep on the post. 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 other board card (including sound card, Modem, hard disk, CPU, etc.) with the motherboard slot contact is good

Pay attention to 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 perfect

Reseat the memory strip once, or replace the new memory or memory slot. If there is a problem with the memory bar, the computer will have a continuous "beep" sound when it starts.

　　7. Check the CPU and motherboard contact 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

Control the motherboard manual, check each jumper, order for "system frequency jumper--cpu frequency jumper--dimm", set CPU voltage jumper should be careful, should not 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 the 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, it should be in the second step to the fourth step check. (video card, etc. caused by the display problem)