【 Weak current College 】 monitor black failure analysis

Computer monitor has a black screen is user in using the computer often encounter problems. In fact, if a little on the computer hardware in the motherboard, CPU, memory, video card, and several large part has a certain understanding, non-corrupt simple components can own hands-on trouble shooting. This is the case, you can follow the following steps and methods of repair for analysis and simple maintenance:

First, check the host power is working

Power supply fan is running? hands move to host chassis back of switching power supply outlet, feel the wind out of the normal power supply, no wind is the power failure; host power switch on the keyboard of the moment three lights (NumLock, CapsLock and ScrollLock) is shining? Yes, power good; host panel power led, HDD led is lit?, the normal power supply. Because power is not working properly or the motherboard does not power on, the monitor does not receive data signal, clearly not displayed.

Second, check to see if the monitor is powered on

The monitor's power switch is turned on? the monitor power light lit? display brightness potentiometer is closed to most small high voltage circuit monitor? normal? hand moves to the monitor screen is "hissing" sound, is erected on the dorsum of the hairs?
　

　　　
　
　
3. check the display card and monitor signal line whether good contact

You can disconnect the plug of the check, D-shaped inlet of bent, broken needles, there is a wide range of dirt, which is many users often encounter problems. In the connection socket, D-shape due to the uneven firmly or forget to tighten the fixing screw jack, Jack, bad, or because of improper installation of too much force within D-shaped inlet to the Ambassador of needles or bending, so bad, etc.

4. open the system checks the display card is installed correctly, and the motherboard socket for contact with good

Display card or the slot for the use of time is too long and toomuch dust and cause bad? display card chip is burned, signs of cracking due to video card?, black screen, the computer will post a short four long "di" beep "sound". Install a display card, to hand hold the display card in the upper part, even forced into the Groove, to show the card retention screw gate and the main cabinet screws mouth, not inserted when you do not force fixed, so as to avoid distorting the video card. If the confirmation is installed properly, you can remove the display card with alcohol tampon wipe pins or another slot installation. If you can't, for a good video card, give it a try.

5. check for other boards (including the sound card, card, video capture card) to the motherboard socket contact is good

Note check the hard drive data cable, power cable connection is correct? replace other card slot, cleaning PIN. This is a lot of people tend to ignore. It is generally believed that computer black is part of the problem, the monitor and other device-independent. In fact, because the sound card, and other equipment installed incorrectly, causing the system to initialize the hard to accomplish, especially in hard drive data cable, power cord, plug the wrong, but also easy to cause the failure.

6. check the memory chips and boards that contact is good, the memory stick is up to the mark of quality

Reseat the memory modules, or replace the new memory stick. If memory problems, computer at start up, there will be continuous inflection of "di" beep "sound".

7. check CPU and motherboard contact is good

As a result of moving or other factors, the CPU socket with the socket Slot1 or Socket7 bad contact. Hand press CPU or take down the CPU to reinstall. Since the CPU is the host of heating equipment Socket7 motherboard type can cause deformation, bending, the CPU socket motherboard bottom mat flat boards.

8. check the motherboard bus frequency, frequency, DIMM jumper is correct

-Control your motherboard documentation, check the jumper, Jumper "system frequency: CPU clock speed jumper-DIMM frequency jumper", set the CPU voltage jumper with caution should not be set too high. This step for some barricade or like overclocked users are very useful.

IX. check parameter settings

Check the CMOS parameter settings are correct, the system software settings are correct. Check the video card and motherboard compatibility is good. It is best to check the data set.

10. check whether the normal environmental factors

If the voltage instability, or temperature is too high, in addition to the above steps to check, according to the working conditions of the computer to quickly locate, such as opening the host power, you can hear the computer post complete, if the hard drive light blinks, then in a second step to step four.

The above check method based on the monitor itself no electrical failure, namely open host power after the monitor power light does not light. If the above steps are check, the monitor does not display, then most likely belongs to the circuit failure, should please the professional maintenance.