Lines that appear on your computer display can be caused by a variety of factors, including hardware problems, software problems, or connection problems. The following 7 - 22 Inch Monitors are the most likely situations and solutions:   Reconnect the video cable: Check that the video cable (such as HDMI, VGA, Display Port, etc.) is firmly connected to the computer and the monitor. Sometimes a loose or damaged cable can cause the lines to appear.   Replace the video cable: If the line persists, try replacing the video cable to make sure there is no problem with the cable itself.   Adjust the resolution and refresh rate: In the monitor display settings of your computer, try adjusting the screen resolution and refresh rate. Sometimes mismatched settings can cause lines to appear.   Check the pc monitor settings: Check if there are any configuration options in the monitor menu that can solve the line problem, such as clarity, sharpness, color, etc. settings.   Update the graphics card driver: Make sure the graphics card driver is the latest version. You can find the graphics card in Device Manager and try to update the driver.   Check for hardware failure: Lines may be a sign of a hardware problem with the monitor or graphics card. Try connecting another monitor to determine if the problem is associated with a specific monitor. If the problem persists with a different monitor, it may be a problem with the graphics card.   Check your computer hardware: If you suspect the lines are caused by a hardware problem, such as a graphics card failure or memory problem, try reinstalling or replacing the hardware.   Reduce electromagnetic interference: Keep your computer away from electronic devices and other objects that may cause interference to reduce the possibility of lines appearing.

LCD (liquid crystal display) is a common flat display technology that uses the optical properties of liquid crystal molecules to display images and text. It is widely used in electronic devices and digital display systems. Its working principle is based on the operation and control of liquid crystal molecules. By controlling the rotation of liquid crystal molecules to adjust the transmittance of light, an image is formed. The display principle of LCD Monitors can be roughly divided into the following steps:   1. Polarization of light (polarizer) Polarizers perpendicular to each other are attached to the outer sides of the two glass substrates of the display screen (mentioned in the previous article), and their polarization directions are perpendicular to each other. When no current passes, the light between the polarizers will be blocked by the first polarizer, so there is no display on the screen. When the current passes, when the light passes through the perpendicular polarizers, the required light source pattern will be transmitted under the action of liquid crystal distortion.   2. Liquid crystal is arranged and distributed under the action of voltage When an electric field is applied to the liquid crystal molecules, they rotate the direction of polarized light. When light passes through the first polarizer, if the arrangement direction of the liquid crystal molecules is consistent with the polarization direction, then the light will be able to pass through the second polarizer and be displayed on the screen.       3. Image display By controlling the conversion of electrical signals and the direction and strength of the electric field, the arrangement and twisting angle of the liquid crystal molecules can be controlled accordingly, thereby achieving pixel-level image control. Then, by adjusting and controlling the loading of different electric fields at different pixel coordinates, the degree of rotation of the liquid crystal molecules will also vary, thus presenting light and dark images and text. In general, LCD display screens mainly involve light polarization, the arrangement and distribution of liquid crystal molecules under the action of the electric field, and the control of the electric field. Through a series of auxiliary components, a stable pattern is finally constructed.