Hehe, I am the after-sales maintenance staff of Hisense. In this case, we always tell users to change the screen, which means that they don't need maintenance and can buy a new one. But in fact, manufacturers can change the lights, but it is more troublesome. There is no equipment outside, so it is impossible to change the lights. If you replace the light bulb, you need the same type of LCD and LED. It's troublesome for us to go to training and watch engineers do it. Generally, the lights will not be changed after sale. I have to pull a TV for you and take it back to the manufacturer. It's very troublesome. Generally, the display screen is guaranteed for three years. If you can't guarantee it, the manufacturer will give you a free replacement. He is not stupid. After three years, it is very likely that there will be no such screen type at all. Of course, there will be no lamps of the same model. Take the back motherboard, power board, logic board and backlight board to the electronic city and sell them now. Take a step back and say you changed the lamp. Only three months' maintenance is guaranteed after sale. After three months, it's hard to guarantee that your screen won't go wrong again. Buy a new TV. By the way, what happened to your TV now? Does the screen turn black when it is turned on? In that case, it may not be that the lamp tube is broken, but the backlight plate.