Missing red color on the monitor - what to do?

Any user can face the problem of the disappearance of red from the monitor screen, regardless of his level of technical knowledge. There are a variety of reasons for this that affect the final result, which means that the ways to eliminate the defect can be very diverse. It happens that there is no specific color on the monitor. For example, this red.

How is this problem expressed?

red color simply ceases to be displayed, the whole picture acquires blue-green hues, black and white colors become dark (light) green or dark (light) blue;
all red color in the image is replaced by black, respectively, all the colors that were mixed with red become darker and blue-green.

In the first case, the reasons may be the same, which lead to the disappearance of any other colors (blue or green), color inversion or monochrome (black and white picture), as well as the colors can be “mixed up” among themselves (instead of one, another is displayed ) In addition, the listed "symptoms" can be combined in different ways. In the second case, the monitor, in addition to the above, becomes dimmer, all remaining colors lose their brightness.

REFERENCE. The frequency of the defect also matters: is it permanent or depends on any conditions? This can be a change in the refresh rate or the duration of the monitor. For example, red color may appear with certain parameters of the refresh rate or after a long work, about five to six hours.

The most common of these is poor contact with the video signal loop. This can be a deformation in the socket or connector, as well as internal damage to the wire due to its kink or mechanical stress (for example, pets can bite it). Try connecting another cable to the monitor, if the defect is gone, it means the wire needs repair or replacement. It also makes sense, if possible, to try connecting to another monitor, this may reveal problems with the socket or other reasons listed below.

Some viruses can affect the color rendering settings, knock them down and reconfigure the settings so that the colors do not display correctly.

The reason may be in the video card, or in the operation of its driver. Sometimes a defect may appear due to the fact that the video card is not inserted accurately into the slot.

Less often, this may be a malfunction of the screen's control board, in which case a periodically completely missing picture may be added to all other problems.

The most serious problem is the failure of the electrodes to power the pixels of the monitor matrix. Unfortunately, in most cases this leads to the need to buy a new monitor.

Depending on the reasons, there are the following solutions:

as already mentioned, the problem with the loop is solved by simply replacing it, it usually costs quite a bit;
if the problem is in the settings, go along the path "Desktop Properties" - "Advanced" - "Color Management", and also check the settings of the video card drivers and adjust the sliders yourself in such a way as to adjust the color rendering. To save time, you can search the Internet for options for standard parameters for your type of computer or select a reset to factory defaults;
if the cause of the distortion of the video card, remove it from the slot, then insert it back.