This situation may be due to the problems of some devices or components in the TV set, resulting in the deviation of signal transmission or display, which may include the problems of the lamp. If the lamp tube fails, it may need to be replaced or repaired to solve the problem.
Different brands of TV picture tubes have different structures and usage methods, which need specific analysis. It is recommended that you contact a professional TV maintenance service provider or after-sales service center to let professionals repair and maintain the TV.