Resolution of abnormal display color

computer monitor color abnormal is a kind of more common computer malfunction, generally in the use of a relatively long time of the monitor is more common, resulting in the color of the monitor is not normal reason nothing more than two, one is a hardware failure, the other is a software problem, although only these two big aspects but the details involved are still very much, The following is a detailed discussion of the possible causes of abnormal display color and solutions.

　　Monitor color is not normal , we recommend that you first use the elimination method, as far as possible to eliminate some simple problems, because the display color display is not normal for many reasons, such as monitor color Control Panel is not set up, the display of wire rod contact bad or rust can lead to such problems occur. If you are new to buy a monitor display color is not normal, first of all, we check the monitor data cable is normal, set whether normal, still not good words can change the host to try, still not the words hurriedly contact dealer replacement treatment. If the display has been used for a long time the display color is not normal, we can still use the above methods to troubleshoot, if the host is normal we can check whether the graphics card and so on, and the author encountered a lot of monitor interface bad or rust caused. If the problem is still we focus on the monitor cable connector to check whether the metal needle is broken or bent, if not, simply to the monitor to replace a new cable to try again, if not yet may be the problem of the monitor, need to overhaul.

If this is due to a common failure of the video card, the color of the monitor is not correctly diagnosed as follows:

　　(1) video card contact Bad trouble:

Poor contact with the graphics card will usually cause no boot and alarm sound or system instability and other failures. The cause of poor contact card is mainly Kakin finger is oxidized, dust, video card quality poor or chassis baffle problems. In the case of poor contact with the oxidation of the gold fingers, can be used to wipe gold fingers to solve the dust caused by poor contact, the general removal of dust can be resolved; For hardware quality caused by poor contact, usually through the replacement method to detect, generally using a replacement video card to solve; for the chassis baffle problem caused by poor contact, Usually the video card is not fully plugged into the video slot and can be removed by replacing the chassis.

　　(2) Compatibility issues:

Compatibility failure usually causes the computer to not boot and alarm sound, the system is unstable or the screen appears abnormal miscellaneous points such as fault phenomenon. Graphics compatibility failure generally occurs in the computer just installed or after the upgrade, more common in the motherboard and video card incompatible or motherboard slots and Kakin fingers can not be fully contacted. Graphics compatibility failure is commonly used to detect the substitution method, the general use of the replacement of the video card to troubleshoot problems.

　　(3) video card component damage failure:

The failure of the graphics components will usually cause the computer to not boot, the system is unstable, Huati and other fault phenomena. Graphics component damage generally includes video card chip damage, graphics card BIOS damage, video memory damage, graphics card capacitor damage or damage to the field effect tube. For the failure of the graphics card components generally need to carefully measure the graphics card circuit in each signal to determine the damaged components, to find the damaged components, to replace it.

　　(4) video card overheating failure:

Because the graphics chip in the work will produce a lot of heat, so need to have a better heat dissipation conditions, if the cooling fan damage will cause the graphics card overheating can not work properly. The video card overheating failure usually causes the system to be unstable, the Huati and so on malfunction phenomenon. The video card is overheating as long as the cooling fan is replaced.

　　(5) Graphics driver failure:

Graphics driver failures usually cause system instability, Huati, text image graphics and other failure phenomenon. Graphics driver failure mainly includes graphics driver missing, graphics driver and system incompatible, graphics driver damaged, unable to install graphics driver, etc. For graphics driver failures, you first go to Device Manager to see if there is a driver for the video card, and if not, reinstall it. If there is, but the graphics driver has "!" ", it is obvious that the card driver is not installed, the driver version is incorrect, the driver is incompatible with the system, etc. General removal of the video card driver reinstall, if installed after the "!" ", you can download a newer version of the driver installation. If you are unable to install the video driver, there is generally a problem with the driver or a registry problem.

　　(6) CMOS Setup failure:

The CMOS setup failure is due to a faulty display of the associated option settings in the CMOS. Common CMOS setup faults include: The motherboard of integrated graphics card, the video card shielding option setting error in CMOS, such as the "AGP driving control" option is set incorrectly (typically "AUTO"), and the "AGP Aperture Size" option is set incorrectly: "FAST Write supported option setting error. CMOS setup errors are generally modified by loading the default BIOS value.

　　(7) Video card overclocking problem:

The video card overclocking problem refers to the computer malfunction caused by increasing the speed of the video card and increasing the working frequency of the video card. After the problem occurs, you can restore the frequency to the factory default settings.

Other symptoms and solutions due to abnormal color display Please refer to the following:

　　First, screen color fault failure phenomenon:

1, in the beginning of the entire screen red (part of the color display will have a back sweep line), but the blink of an effort on the normal;

2, in the use of occasional screen redness phenomenon, but also blink of a normal;

3, the entire screen is white red and with a very heavy back sweep line and immediately protective shutdown (or black screen and can not be turned on). Fault point of misunderstanding: for this type of failure many people are said to be a video card hardware failure, but also some people say that the picture tube is scrapped, and some people say that the graphics card driver damage caused by these views are wrong. Failure reason and countermeasure: Indeed, touch the pole this kind of picture tube failure can cause this fault phenomenon, but this is not impossible to repair--a slight electric shock, a serious reusable filament power supply winding, and sometimes a color electron gun of the visual power supply resistance virtual welding or open circuit damage or large resistance will cause such failure phenomenon. In addition, some models just have a certain slight leakage of the pole, usually do not need to repair, only in the power-on when there is a momentary bias, a few seconds can be normal (1th fault phenomenon). For the touch pole (sometimes only leakage) fault you can only be entrusted to professional maintenance personnel for maintenance, its characteristics are usually caused by protective shutdown. For irregular color faults, it is usually necessary to repair the visual power supply resistance and peripheral components of the relevant electron gun. For the power supply resistance is caused by the failure of circuit breakers and the same as the Mansi with a back sweep line and a color extremely bright, but it does not lead to protective shutdown, the solution is very simple--for the new resistance to the same resistor can! Of course, if the resistance has become larger, but also to carry out new treatment. In the humid season we have to put the tube tubes oxidation this reason to take into account, although the cause of the partial color fault is not much, but I did encounter, after analysis may be the design or component quality is not very good result: (. Note: I do not know is the design habits or what other reasons, the bias color fault red is the most likely, followed by the blue, and finally the green:). In addition, there is a relatively easy to make detours fault reason-screen dust too much lead to screen display white when red! This type of failure occurs in the color temperature of the monitor (many monitors can set their own color temperature), so, when you encounter white (and similar color) red fault, you'd better clean the screen before you perform other checks, if the failure disappears means you will not take the "unlucky" detour:). Of course, the brightness of some models set too low can also cause this "fault" phenomenon. Note: If all of the above methods are invalid and the display has been in use for far more than five years, then we can be seen as the electronic gun aging caused by the color of the bias color monitor fault.

　　Second, the boot image fuzzy fault failure phenomenon:

1, when the image is blurred, although the use of a period of time after the gradual normal, but the shutdown after a period of time after the failure again will appear again, and is a day, more and more serious fault;

2, after the power-on image has been blurred, the use of a long time after the improvement. The misunderstanding of the fault point: some half professionals see these two kinds of trouble is that the CRT life is up, some maintenance staff saw that will be said to adjust the contrast or high pressure packets on the focus of the potentiometer and accelerator potentiometer will be good, but also some people say that the video card hardware failure or video drive damage. These fault points are wrong to judge--the aging of the picture tube and the decline in contrast will not cause this kind of failure phenomenon. As for the adjustment of the gathering pole and accelerate the pole potentiometer is more incorrect, this is not a cure, and it is difficult to adjust to a satisfactory degree, the most headache is not how long the failure will recur, and even accelerated picture tube aging. Failure reasons and Countermeasures: usually use more than 2 years of color display will appear this fault, the real reason for the failure of most cases is the tube seat damp oxidation, as long as the replacement of genuine new tube seat can be ruled out. But some people say that before inserting a new tube seat to find a small piece of sandpaper before the end of the image tube protruding pipe feet polished clean, the purpose is to remove the oxide layer, this practice is tantamount to the lily. In the author's replacement of the tube seat of the picture tube, there are some really in the foot of some oxides, but these oxides are omitted from the original tube to the foot of the tube, as long as the brush can be cleaned with a sweep. So far, the author has not seen the situation of the pin was oxidized, but because the force is too large to make the tube foot leakage and damage to the picture tube is a few cases, so we do not use sandpaper to polish, lest appear "death" sexual damage! If the replacement of the tube seat is not effective to replace the high-pressure package, but this work I suggest you are best to find professionals to carry out! In addition, some models of the video part of the circuit is more special, sometimes after the failure will also cause image blur, but at this time the brightness and line, field amplitude are also abnormal, for such trouble points I recommend you to deliver professional treatment! If the color display is not a brand-name products and the use of the year has been very long, then I suggest you find a professional electrical maintenance department to replace the work of the tube seat, so as to avoid leakage of pipe and other accidents after the responsibility:!

　　Third, the use of the image of fuzzy fault failure phenomenon:

1, when the image is clear, but with the extension of the use of time and more and more fuzzy display color abnormal;

2, in the use of the image occasionally blurred, but can soon return to normal, but the use of a few days or months after the more and more serious, the more frequent. The misunderstanding of the fault point: Some people think that this kind of fault is the monitor circuit part of the problem-may be the line tube, the reverse diode, the inverter capacitor components such as thermal stability is not good or is caused by virtual welding. These realizations can be said to be completely wrong, because none of these components can affect the clarity of the image. Failure reason and countermeasure: The true fault point of the 1th kind of fault phenomenon is usually due to the aging of the focus pole knob of the high-pressure package, you can first change a high-pressure package to try. Of course, if the display has been in use for more than 6 years, then we also have to take into account the possibility of aging tube. In addition, one time the author for a teaching digital professor of this fault phenomenon is actually the tube seat of the picture tube and the large area of the apparent plate cathode copper foil leakage phenomenon caused by (after analysis, such as design problems), so sometimes you get stuck in a repair dilemma, you can replace a genuine tube seat. For the 2nd type of fault phenomenon, usually the tube seat quality is not high, you can replace the new product to solve the problem.

　　Four, screen flashing failure phenomenon:

1, the screen edge has flashing phenomenon;

2, the whole screen has flashing phenomenon;

3, a corner of the screen has a flashing phenomenon. Fault points of the misunderstanding: many people think that this is the power supply voltage is not enough or instability caused by some "master" or even said to be due to some electronic ballast lamps or electromechanical electrical appliances to color display power interference, it is said that the graphics card has been caused by hardware failure. In fact, these views are wrong, because the display of the voltage requirements are not very strict-most of the current color display can be in the 100v~240v power supply voltage under normal work. Of course, if the voltage is too low or the voltage fluctuation is too large, it is another way to recognize, however, in the past two years, the national implementation of rural power grid reform has already begun to take effect, has fundamentally solved the past rural voltage instability, low voltage problems, and in the city these problems are usually not exist, So these factors are no longer important. As for other electrical appliances will cause interference is even more impossible, after all, color display is not a mutual inductance voltage-stabilized power supply, and other appliances even if the interference will not be screen flashing! Failure reason and countermeasure: the first two kind of fault phenomenon's real fault reason, usually is because the line circuit partial component virtual welding or the power supply place +300v filter capacitance capacity reduction result. The latter is not likely to be high--only in individual models and in the case of a more severe loss of capacity, the human eye can discern the flicker. In addition, some models of the video-powered part of the circuit is relatively special, sometimes the part of a component of virtual welding can also cause this fault phenomenon. Of course, if you set your monitor's resolution and refresh rate too high or too low, you can also cause this type of failure, so you can set the resolution and refresh rate to the middle value try (note: Long working in overclocking state will make some components aging and this failure, and the fault point is more difficult to find). There is a bug in the driver for the video card or monitor, so you have to try updating the driver first. If none of the above processing is valid, you can focus on whether the high voltage and high voltage generated by the high-pressure package are normal, because sometimes these two voltage anomalies can also cause such phenomena.

　　Note: If the fault is serious, then the maintenance requires you must have some hands-on ability and professional knowledge, so I suggest you if you eliminate the simple cause of the failure of the repair after the delivery of Electrical maintenance department to deal with. Sometimes some magnetic items (such as some low-end power box or ADSL external cat power supply, etc.) placed near the monitor will cause a certain corner of the screen flashing, so encountered this phenomenon to first try to clear the display around the objects to see, usually the problem can be solved.