My LCD tv has been having intermittent issues with vertical lines running through it. Sometimes they're black and throughout the screen and sometimes they're larger red or blue lines.

SOURCE: Vertical lines on screen when viewing

If the lines are there all the time or intermittent but in the same location it is an indication of a bad panel. The panel driver can also be the cause of this symptom. Samsung panels have had issues with the connector that carries the LVDS signals to the panel itself, this is not serious and can be resolved and little cost. Joe Weibel

SOURCE: LCD TV - Vertical Blue line

My Lcd monitor has blue line? How can I solve this problem?

SOURCE: LCD TV - Vertical Blue line

use menu and h/v then change then move to higher level and it will take it away.

SOURCE: black vertical lines on flat screen

All plasma an lcd tvs have boards that control vertical and horizontal output to their respective areas. They are connected to the screen by ribbon cables. If one of these boards fails all together, has a failed chip, a bad connection, or a bad ground somewhere it will result in a black line in the area of that board. A bad ribbon cable connection on the bottom will result in a vertical black bar though the screen. Many times reseating the connection will fix it, if the ribbon cable has been nicked there could be a severed connection. They can sometimes be fixed, but it is a pain. An yes I have done it, and the bar is gone. The same will happen if the chip that outputs to that area opens. The connectors are the first place to look paying close attention to the cable, they are extremely delicate so great care must be taken if you decide to tinker with em, the usually have lift locks that release them, but it is very easy to wreck em. Good luck.

SOURCE: red blue green lines down my lcd tv screen

HP-R4252 NOT LCD TV
IF LCD TV has vertical lines try cleaning T-con board to lcd panel cable or replaced t-con board