1, electromagnetic interference. The most common possibility is that the laptop will shake when it is connected to the power supply, and it will be fine if it is not connected to the power supply. This is generally easy to appear in industrial electricity. You only need to replace a power adapter or cut off the ground wire of the power plug.

2. Play movies. In this case, your computer socket is connected to electricity, boiling water for cooking or using high-power appliances such as washing machine. This is very simple, just don't connect these devices;

3. The influence of magnetic field. If your stereo has high power and weak anti-magnetic function, it is more likely to happen next to the monitor. Stay away from the magnetic field at this time;

4. The resolution is wrong. It is also common that the resolution that the monitor does not support leads to this problem. Generally, it is enough to change back to the correct resolution, but now the display generally has the function of "AUTO" automatic adjustment, just press this button;

5, the graphics card problem. If it is a desktop computer, it uses a discrete graphics card. Loose or damaged graphics card will cause screen jitter. At this time, just plug in the power supply or change the monitor.

6. The drive is wrong. This problem is also prone to occur if the hardware driver is wrong. At this time, you can right-click "My Computer", select "Management", and then select "Device Manager" to see if there are any items with exclamation points. If not, replace the driver of the item under "Graphics Card" or "Monitor"; 7. The host itself. On the inferior chassis, the main engine causes, such as poor wiring and guidance interference, can not be ignored. This problem can be tested by changing the host, and the best solution is to install an independent graphics card; 8. Connection wire problem. Inferior cables have no shielding function, so they are easily affected in power cord accessories. Even without this influence, inferior cables themselves may cause this problem. At this point, the connecting cable can be replaced;

9. The monitor is aging. This is the last thing we want to see, but if you can't solve it through the above methods, just change a monitor, then check whether the monitor is aging;

Analysis and research process of water ripple on computer display

In the circuit of liquid crystal display, the phenomenon of screen flicker is only related to backlight and high voltage board. In this fault, if the display appears black screen, it may be related to the power supply part. Judging from the phenomenon you described, it should be caused by the difficulty in starting the backlight. One reason is that the backlight is aging or damaged, and the other is that there is breakdown between the inverter coils of the high-voltage board. Suggest sending it for repair. When sending for repair, you can confirm the fault position with an external light.

It is recommended to follow the elimination steps, check it, and then scrap or repair it.

There are many reasons for abnormal display color, which are generally divided into three categories: display failure, poor signal transmission quality of display data line and host graphics card. The judgment method is to put the monitor on another host for testing and replace the cable. If the problem still exists, it is likely that the display itself is faulty, and the life of the LCD panel is very long, so it is caused by the aging of the lamps in the display. At the same time, it can also detect whether it is a host problem.

As for the cable problem, there are many things to say, and now monitors support a variety of display data lines, and the effect is different.

Here are some possible solutions.

The first thing to understand is that the abnormal screen color is nothing more than two major sources: graphics cards and monitors. So let's start with these two points.

Software problems:

There is no driver installed for the graphics card. In fact, even if there is no driver, the display will display each color correctly, so that the meta color will not be lost, but this problem may occur if the driver is installed incorrectly. For example, the graphics card type and driver type are inconsistent, and the version is inconsistent. This problem can be solved simply by uninstalling and reinstalling the original graphics card driver.

The way to uninstall the driver is: My Computer-Right Click Properties-Hardware-Device Manager-Graphics Card-Right Click-Uninstall. The method to detect whether there is a problem with the graphics card driver is simple: Take WindowsXP as an example. If the red logo on XP can be displayed correctly when the computer is turned on and enters the scrolling waiting screen, but it cannot be displayed after entering the system, it proves that the graphics card driver is incorrect.

Monitor problem:

Monitor hardware failure. There are many reasons for the hardware problems of the display, such as the aging of the picture tube, circuit oxidation caused by humid environment, static electricity and so on. , which will lead to abnormal color display. According to different reasons, different methods can be taken, such as putting the monitor in a ventilated place (many people like to cover the monitor with a piece of cloth to prevent dust. Here a reminder, use a special dust cover to prevent dust, otherwise it may lead to poor ventilation and heat dissipation of the monitor).

Graphics card problem:

The display problem is the most common problem. For example, the card slot is not in close contact, the graphics card is overheated, and there are problems with the wiring and components of the graphics card. For the problem that the card slot is not tight, you can pull it out and insert it again. Sometimes it may be because there is more dust. You need to clean the slot here, and use tools such as rubber to clean the graphics card. For the problem of overheating of the graphics card, you can install a small fan on it or put the chassis in a ventilated place. The abnormal color caused by the overheating of the graphics card is often normal when it is first turned on, and it begins to fade after a period of use.

Wiring problems:

Connecting cable between monitor and graphics card. All the color information on the graphics card is often transmitted to the display through the data line. If something goes wrong here, it will also cause three colors to be missing or abnormal. So you can consider trying another thread.

Line interface pin problem:

This is my problem. The lack of red on the monitor has been bothering me for a long time. I have used all the above methods and failed to solve them. When chatting in the group for the last time, Comrade Laotian asked me to see if the pin at the interface of the graphics card was broken. I unplugged the data cable and checked it. Sure enough, one of the needles was bent badly and did not insert the pinhole. Later, I came straight with tweezers and found that the color of the display was all normal, and the missing red came back.

I saw on the internet that many people have encountered the problem that the color of the monitor is abnormal or one of the three colors of red, green and blue is missing, but there are few solutions.