LCD backlight malfunction

In addition to the above fault phenomena, LCD display backlight faults are also common, mainly manifested as aging and complete damage, that is, not emitting light. After the backlight lights age, you can see that the image turns yellow. Adjusting the color temperature and white balance cannot solve it well. At the same time, adjusting the screen brightness to the maximum is also difficult to meet the usage requirements. This reminds you that it is time to change the lights.
After the display with a single tube structure is damaged, when turned on and viewed diagonally under sunlight, a dim image and text display can be seen. The new multi tube display shows uneven image brightness when a certain tube is damaged, such as a slightly dim upper part, indicating that the upper tube is damaged. By touching the position of the display tube with your hand and comparing the temperature, you can also determine whether the tube is damaged. A normal display tube should have the same temperature position. However, due to the fact that most new displays have high-voltage balance protection circuits, a damaged light tube often does not exhibit uneven brightness, but rather the display cannot be turned on or goes black after startup, which depends on the specific display circuit