Ask for help about changing the lamp tube and taking the LCD screen

According to the test of external lights, only one of the four lights is aging, so it is prudent to replace it with a two-lamp high-voltage board, cut off the high-voltage part of the original integrated board (which can also be used for other purposes), and fix the new board in its original position, because many brand-name machines now have two lights, which reduces the risk of changing lights, and the effect is good after replacement. It should be better than an external light.