Xiaobian's computer the day before yesterday, the system was in disorder, it was taken overhauled once. When I finished the move and came back to the monitor, I felt uncomfortable when I looked at the color of the screen. The red at different depths was gray to black, and the bright green was yellow. After observation, it was found that there was no red on the original display, and all the reds were replaced by gray without gray scale, which looked quite awkward. Everyone knows that red is one of the ternary colors. The ternary color is the RGB we often say, that is, R stands for red, G stands for green, and R stands for red. They make up all the colors you can see on the screen. Then if you lose any of them, it will cause a visually great contrast. After you understand all the reasons for the problem, you have to check it step by step. Here are my solutions and some potentially useful solutions found online, listed here. The first thing to understand is that the screen color is not normal, but there are two main sources: graphics card and display. Then let's talk about these two points one by one. 1. Display problem: The display hardware is faulty. There are many reasons for the hardware problems of the display. For example, the aging of the picture tube, the humidity of the environment, the oxidation of the line, the static electricity, etc. will cause the color display to be abnormal. Different methods can be used according to different reasons, such as placing the display in a ventilated place, etc. (Many people like to cover the display with a piece of cloth to prevent dust. Here dudo reminds everyone that dustproof should use a special dust cover, otherwise It may cause the display to ventilate poorly.) 2, the software problem: the graphics card driver is not installed. In fact, even if there is no driver, the display will correctly display each color, and there will be no loss of color, but this problem may occur if the driver is installed incorrectly. If the type of the graphics card and the driver type are inconsistent, the versions are inconsistent. This kind of problem is very simple to solve, you can uninstall the original graphics card driver and reinstall it. The way to uninstall the driver is: My Computer & mdash;— Right click <;Properties”——Hardware——Device Manager——Display Card——Right ——Uninstall. The method of detecting whether the video card driver problem is very simple: In the case of Windows XP, when the computer is booted into the scroll waiting screen, if the XP logo is correctly displayed and the system is not displayed after entering the system, it proves that the graphics card driver is not correct. 3, graphics card problem: display problems are the most frequent problems. For example, the card slot is not tightly contacted, the graphics card is overheated, the graphics card line and component problems, and the like. For the problem that the card slot is not tight, you can unplug it and reinsert it. Sometimes it may be because there is more dust. You need to clean the slot and clean the card with tools such as rubber. If the graphics card is overheated, you can install a small fan or place the chassis in a ventilated place. The color caused by the overheating of the graphics card is often normal when it is turned on. After a period of use, it starts to fade. 4, wiring problem: the connection between the display and the graphics card. All the color information on the graphics card is often transmitted to the display by a data line. If there is a problem here, it will cause the ternary color to be missing or the color is not normal. So you can consider changing a line to try. 5, line interface pin problem: This is the problem I encountered. The lack of red in the monitor has been bothering me for a long time. I have not solved all the above methods. The last time I chatted in the group, Comrade Laotian asked me to see if the pin at the interface of the graphics card was broken. I pulled the data cable down and checked it, and one of the needles was severely bent and was not inserted into the pinhole. Later, after using a small scorpion, I found that the color of the display was normal, and the missing red was back. This article comes from [System Home] www.xp85.com