For computer users, the closest is the display, which can be said that it is an integral part of the computer system. At present, everyone is often used or a CRT display, and the CRT display is also very easy to fail, so how can I check and exclude these faults? The following will introduce some of the common fault answers of the display, I hope to help everyone use the computer.
Q: How should black screen failure?
A: The computer monitor appears black screen is the problem that the user is often encountered in the computer. In fact, as long as you have a certain understanding of the motherboard, CPU, memory, display cards, etc. This happens, you can analyze and simply repair according to the following maintenance steps and methods:
1. Check if the host power is working; if the power fan is rotated? Move it to the air outlet of the switching power supply in the back of the host chassis. It feels that the wind is blown out. The power supply is normal, and there is no wind. a bit? Yes, the power supply is normal; the host panel power indicator, whether the hard disk indicator is bright? On, the power is normal. Because the power supply is not normal or the motherboard does not power up, the display does not receive the data signal, it is obviously not displayed.
2. Check if the display is powered; is the display of the power switch of the display already opened? Is the display of the display bright? Is the brightness potentiometer of the display to a minimum? Is the high voltage circuit of the display normal? Do you have a "咝咝" sound with your hand to the display screen, whether the hand is erected?
3. Check that the display card is good in contact with the display signal line.
You can unplug the plug and check if there is a curved, broken needle, a large amount of dirt in the D-shaped jack, which is a problem that many users often encounter. When connecting a D-shaped jack, due to uneven force, or forget to tighten the socket fixed screw, the socket is in contact with poor contact, or because the installation method is too much to break the needle or bend, so that the contact is poor.
4. Turn on the chassis to check if the display card is installed correctly; whether it is good with the motherboard slot.
Whether the display card or slot is too long, there is too much in use, so that the contact is poor; the chip on the display card has a lair and cracking traces; when the display card causes the black screen, the computer will have one when the computer is turned on. Short four long "嘀" sound tips. When installing the display card, you have to hold the upper half of the display card, insert the slot in the slot, and make the fixed screw port of the display card agree with the screws of the host, do not force it to be forced to cause the graphics card to be distorted. If you confirm the installation correctly, you can remove the display card with alcoholic cotton ball to rub your foot or change a slot installation. If you can't still do it, try a good graphics card.
5. Check if other boards (including sound cards, decompression cards, video capture cards) are good to contact with the main board.
Pay attention to check the hard disk data cable, is the power cord connection correct? Replace the slot of other boards, clean the pin. Many people often easily ignore. It is generally believed that computer black screen is a problem part of the display and is independent of other devices. In fact, due to the installation of the equipment such as sound card, it is difficult to complete the system initialization, especially the hard disk data cable, power cord, and it is easy to cause no display.
6. Check that the contact between the memory strip and the motherboard is good, and whether the quality of the memory strip is too hard.
Reverse the memory module or replace the new memory bar. If the memory strip has problems, the computer will have a continuous "嘀" sound at startup.
7. Check if the contact of the CPU and the motherboard is good.
The CPU is in contact with the socket due to moving or other factors. Press the CPU or remove the CPU reinstallation. Since the CPU is the heating of the host, the Socket 7 may cause the motherboard to bend and deform, and can be flat at the CPU socket motherboard. 8. Check if the bus frequency of the motherboard, the system frequency, whether the DIMM jumper is correct.
Control the board instructions, check each jumper one by one, the order is "system frequency jump CPU main frequency jumper - DIMM frequency jumper", be careful when setting the CPU voltage jumper, should not be set too high. This step has a lot to use for some packages or users like overclocking.
9. Checking parameter settings Check that the CMOS parameter setting is correct, whether the system software settings are correct. Check if the compatibility of the graphics card and the motherboard is good. It is best to check the information for settings.
10. Check if environmental factors are normal.
Whether the voltage is unstable, or the temperature is too high, in addition to the above steps, it can also be quickly positioned according to the operation of the computer. If the host power is turned on, it can be heard that the computer self-test is completed, if the hard disk indicator keeps Blinking, check in the second step to fourth step.
The above inspection method is based on the display itself without electrical failure, ie the power indicator of the display after turning on the host power supply is not bright. If the above steps are checked one by one, the display is still not displayed, and it is likely to belong to a circuit failure, and professional repairs should be requested.
3. Check that the display card is good in contact with the display signal line.
You can unplug the plug and check if there is a curved, broken needle, a large amount of dirt in the D-shaped jack, which is a problem that many users often encounter. When connecting a D-shaped jack, due to uneven force, or forget to tighten the socket fixed screw, the socket is in contact with poor contact, or because the installation method is too much to break the needle or bend, so that the contact is poor.
4. Turn on the chassis to check if the display card is installed correctly; whether it is good with the motherboard slot.
Whether the display card or slot is too long, there is too much in use, so that the contact is poor; the chip on the display card has a lair and cracking traces; when the display card causes the black screen, the computer will have one when the computer is turned on. Short four long "嘀" sound tips. When installing the display card, you have to hold the upper half of the display card, insert the slot in the slot, and make the fixed screw port of the display card agree with the screws of the host, do not force it to be forced to cause the graphics card to be distorted. If you confirm the installation correctly, you can remove the display card with alcoholic cotton ball to rub your foot or change a slot installation. If you can't still do it, try a good graphics card.
5. Check if other boards (including sound cards, decompression cards, video capture cards) are good to contact with the main board.
Pay attention to check the hard disk data cable, is the power cord connection correct? Replace the slot of other boards, clean the pin. Many people often easily ignore. It is generally believed that computer black screen is a problem part of the display and is independent of other devices. In fact, due to the installation of the equipment such as sound card, it is difficult to complete the system initialization, especially the hard disk data cable, power cord, and it is easy to cause no display.
6. Check that the contact between the memory strip and the motherboard is good, and whether the quality of the memory strip is too hard.
Reverse the memory module or replace the new memory bar. If the memory strip has problems, the computer will have a continuous "嘀" sound at startup.
7. Check if the contact of the CPU and the motherboard is good.
The CPU is in contact with the socket due to moving or other factors. Press the CPU or remove the CPU reinstallation. Since the CPU is the heating of the host, the Socket 7 may cause the motherboard to bend and deform, and can be flat at the CPU socket motherboard.
8. Check if the bus frequency of the motherboard, the system frequency, whether the DIMM jumper is correct.
Control the board instructions, check each jumper one by one, the order is "system frequency jump CPU main frequency jumper - DIMM frequency jumper", be careful when setting the CPU voltage jumper, should not be set too high. This step has a lot to use for some packages or users like overclocking. 9. Checking parameter settings Check that the CMOS parameter setting is correct, whether the system software settings are correct. Check if the compatibility of the graphics card and the motherboard is good. It is best to check the information for settings.
10. Check if environmental factors are normal.
Whether the voltage is unstable, or the temperature is too high, in addition to the above steps, it can also be quickly positioned according to the operation of the computer. If the host power is turned on, it can be heard that the computer self-test is completed, if the hard disk indicator keeps Blinking, check in the second step to fourth step.
The above inspection method is based on the display itself without electrical failure, ie the power indicator of the display after turning on the host power supply is not bright. If the above steps are checked one by one, the display is still not displayed, and it is likely to belong to a circuit failure, and professional repairs should be requested.
