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? There are many kinds of vertical bars on the LCD screen, two common situations: the whole screen is a wavy vertical line, this situation is generally caused by interference signals, you can try to check whether there is interference sources; The other case is that there is a single or more vertical bright lines in the part of the screen, which is a fault of the screen. In lay terms,
? Inside the LCD screen, the signal output of the motherboard is connected to the row and column drive circuit inside the LCD screen through the tab line, which is integrated on a thin film circuit board and then connected to the display screen. The connection line is also the type of thin film line. Single or more vertical bright lines appear on the screen, mostly because this part of the drive circuit is faulty, either the chip is bad, or some pin contact of the film connection line is poor