How to determine the LED LCD TV backlight strip failure?

How to determine the LED LCD TV backlight strip failure?

1. The relationship between the backlight board and the backlight strip:

The LCD backlight system is mainly composed of a backlight strip and a backlight plate. When these two parts fail, they are all related. At present, the LED technology is relatively mature, and the performance of the backlight system is very good, and the probability of problems is very low. However, if there is a problem in the backlight system, it will be fed back on the output of the backlight.

2. Damage to the backlight bar:

When the backlight tube is damaged, the phenomenon is: when it is first turned on, it starts to emit light, and after a while, it goes out. After it is off, if you face the sun or light, you can see the image on it. The sound of the TV can also be heard normally.

3. Solutions to the failure of the backlight strips:

A: At present, the general maintenance department does not have the technology to replace the backlight tube, so if a light is damaged, the overall brightness of the TV can be increased. Because there is a backlight, when the brightness is high, it can cover up the influence of a small part of the lamp tube damage. It is basically imperceptible, but if there are more damages, the manufacturer needs to carry out special maintenance.

B: Sometimes because the weather is cold or the machine is not turned on for a long time, there may be no picture on the TV. At this time, the reason is that because a certain backlight tube starts slowly, the system will cut off its power for self-protection. , So there is a black screen in a certain area. At this time, you can turn on the machine several times to solve it.