[LG Monitor] How to Fix Screen Lines: Explanation Guide

To fix horizontal or vertical lines on an LG Monitor, start by diagnosing whether the issue stems from an external signal or the hardware itself. First, disconnect the monitor's signal cable (HDMI or DisplayPort); if lines remain visible on the "No Signal" floating screen, the problem is internal to the hardware, requiring a certified technician. If the lines disappear during this test, inspect your video cable for bent pins, dust, or damage, and ensure you are using an authentic cable that matches your device's exact specifications.

Causes and Symptoms

• Is there a vertical or horizontal line on the screen?

Try this

➔ Check if the pins are damaged or have foreign objects. If they do, replace the cable with an authentic cable.

Check the cable signal condition of the device connected to the monitor and check the spec or setting of external device.

Is there a vertical or horizontal line?

➔ Remove the monitor signal cable

If [No Signal] screen shows vertical lines in the same location, then it requires accurate inspection by an LG Electronics technician.

Are there many vertical lines like rainbows?

➔ Remove the monitor signal cable and connect it again.

※ If you still experience the same issue after reconnecting the cable, have your monitor checked by an LG Electronics service technician.

Did you use the cable that came with the monitor?

If you use a cable that doesn't meet the product's specifications, it may cause issues such as noise, no display, etc.

Frequently Asked Questions (FAQ)

Q. How do I know if the lines are caused by my monitor or my PC?

A. Unplug the HDMI or DisplayPort cable from the monitor. If the lines are still visible on the "No Signal" floating box, the monitor itself has a hardware issue.

Q. How do I fix lines on an LG OLED gaming monitor?

A.Faint lines or image retention can often be fixed by running a pixel refresh. Use the monitor's joystick button to navigate to Settings > OLED Care and select Image Cleaning.