When Your Screen Splits: Resolving Vertical Lines on an Acer Monitor


“I’m experiencing an issue with my Acer XB241H monitor, which displays persistent vertical lines in purple, green, and blue colors. This problem occurs with both HDMI and DisplayPort connections, and the lines are even visible when the monitor indicates ‘no signal.’ There has been no physical impact to the device. Could you provide expert advice on how to resolve this?”


If you’re facing the issue of persistent vertical lines on your Acer XB241H monitor, it can be both distracting and detrimental to your viewing experience. The appearance of these lines across various color spectrums and connection types, as well as their presence without any physical damage to the monitor, suggests a few potential causes and solutions.

Potential Causes

1. Cable Issues: Faulty or loose cables can often cause display problems. Even though you’ve mentioned that the issue persists across different connection types, it’s worth double-checking the cables for any signs of damage or loose connections.


Monitor Settings: Incorrect monitor settings can sometimes lead to display issues. Resetting your monitor to its default settings might resolve the problem.


Graphics Card Problems: The graphics card is responsible for rendering the display output. Any issues with the graphics card or its drivers could manifest as lines on the monitor.


Monitor Defect: Since the lines appear even when there’s no signal, this could indicate a hardware defect within the monitor itself.

Expert Solutions

Here are some steps you can take to troubleshoot and potentially fix the issue:

1. Power Cycling:

  • Turn off the monitor.
  • Unplug all cables, including the power cord.
  • Press and hold the power button for 30 seconds to discharge any residual power.
  • Reconnect the cables and turn on the monitor to see if the issue is resolved.
  • 2.

Cable Check:

  • Try using different cables to connect your monitor to the computer.
  • If possible, test the monitor with another computer to rule out any issues with your current setup.
  • 3.

Monitor Reset:

  • Access the monitor’s on-screen display (OSD) and restore the factory settings.
  • 4.

Graphics Card Inspection:

  • Update the graphics card drivers to the latest version.
  • If you’re comfortable with hardware, reseat the graphics card in its slot after powering down your computer.
  • 5.

Professional Assessment:

  • If none of the above steps work, it may be time to consult with a professional or reach out to Acer’s customer support for further assistance. In some cases, the monitor might require a repair or replacement, especially if it’s a manufacturing defect.


Vertical lines on a monitor can be caused by a variety of factors, from simple cable issues to more complex hardware defects. By methodically going through the troubleshooting steps, you can identify the root cause and find an appropriate solution. If the problem persists, seeking professional help is the next best course of action to ensure your monitor is functioning correctly. Remember to check your warranty status with Acer, as you might be eligible for a repair or replacement if it’s a confirmed manufacturing defect.

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