1. Display on a computer screen the entire screen will be reddish or blueish at the beginning of the startup process, and a line will be displayed when the computer is first turned on, but it will be restored after a while;
2. The screen will occasionally turn red while in use, but it will only be restored after a short period of time.
3. The overall display when you press it, the square LCD goes black and there is no way to open it. It is white and red, with a heavy flyback line, and it immediately turns the screen off.
Although square LCD display tube failures (such as electrode contact) will result in this failure phenomenon, it is not impossible to repair it: a mild electric shock can be used to rewind severely damaged filament power windings, and this failure phenomenon may also be caused by other factors. A color electron gun's visible discharge power supply resistance is open-circuit damaged or excessively large as a result of a welding failure. Also in some cases, there is only a small amount of inter-electrode leakage, which is usually not a problem and does not require maintenance, but there will be an instantaneous color deviation when the lamp is turned on, which will naturally correct itself after a few seconds of operation.
It is usually possible to resolve irregular color deviation faults by repairing the discharge power supply resistance and peripheral components of the relevant electron gun.
During the rainy season, we must consider the possibility of oxidation of the CRT socket. Despite the fact that there are only a few color deviation failures caused by this, the author has personally experienced one. After further investigation, it is possible that the problem is due to poor design or component quality.
I'm not sure if it's a design habit or something else. The color deviation has the greatest chance of failing, followed by blue and finally green.
Please keep in mind that if the display has been in use for more than five years, we can classify it as a color deviation failure caused by the aging of the electron gun in the LCD liquid crystal display.