What causes vertical lines on an LCD screen?

Although they may appear thin or thick, black or white, in the center of your screen or along the edge, vertical lines on a television or computer screen may interfere with your experience. Unfortunately, these lines can mean a severe technical problem that is interfering with the signal between the unit’s processor and its liquid crystal display, or LCD (for its acronym in English).

Failure of the TAB

Automated tape attachments, or TABs, are an integral part of any LCD monitor. These unions digitize the information they receive from the processor and send it to very small transistors that create the electric currents that cause the colors you see on the screen. A failure of the TAB – also known as an error in the TAB – happens when these connections are damaged or disconnected from the processor. When this happens, rows or full columns of pixels can be turned off because they are not receiving messages from the processor to create their colors. The TABs can usually be joined again by a professional television technician but over time they can become so loose or so problematic that they will need to be replaced completely.

LVDS cable

Also known as low-voltage signal differential, LVDS cable systems use copper twisted cables to carry high-performance information. This technology is more efficient than the first electrical systems used in LCD products and can reduce the cost of electricity to power the screen. Even so, when the copper wire that forms the LVDS is compromised, either by a jolt or by residual damage, it interferes with the signal that it carries from the processor to the LCD screen. As with the failure of the T-CON board, it results in pixilation as well as vertical and horizontal lines on the screen.

It’s not your fault

Although some vertical lines are the result of damage to your screen, other causes have nothing to do with you, your screen or even its use. Instead, the lines can be related to the video source. Anything that interferes with any Internet, cable, or satellite signal, such as a misaligned satellite or a frayed coaxial cable, has the potential to cause distortion of images, including but not limited to lines on the screen and problems of pixilation Even the source itself can transmit images with lines in them; for example, a local news station that suffers from signal interference during a live program can transmit images with lines, pixilation or blurring.