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Poor Picture Quality on LG Ultra HDTV

  • Troubleshooting
Poor Image Quality on LG UHDTV

LG ultra high definition TV (LG UHDTV) offers a super viewing experience using advanced technologies to deliver video contents in richer colors, smoother motion, and elevated brightness. Ultra HDTV is unlike HDTV which produces video contents at a resolution of 1080P. Ultra HDTV delivers video contents as 4K content with a resolution of 3840 x 2160 (2160P), this is four times the resolution of a full HDTV.

If the image quality you see on your screen at home is not as eye-catching as you expected, just like the video demonstration you saw at your local store, there are some quick-fix solutions for that.

Reasons for poor image quality:

  • Watching video content of lower resolution (1080P or lower).

  • Your HDTV settings not being setup properly.

  • Using cables that cannot support UHD videos.

  • Your external device does not support 4K output.

  • The video output settings from your external device are not configured properly.

Let’s troubleshoot your UHDTV to bring out the best of your TV.

What type of TV do you own?

First Step - Test for 4K Content

Your LG UHDTV uses the newest technology to display your video contents in stunning 4K resolution, but presently some of the video contents available online are still in HD or even lower resolutions.

Nevertheless, your smart UHDTV is designed to scale this lower resolution contents to near 4K automatically. While the content is being scaled to a 4K resolution, this process can cause some of the edges and details in the image to have a smooth or soft look; compared to the sharp and crisp image you saw at the retail store.

The first step, we need to test your TV with a 4K Content. Follow either of the two methods explained below:

After this test, if your TV displays as you expected with the 4K video, then your UHDTV works perfectly fine and you have only been watching lower resolution videos.

Still having poor image quality? Yes, the image is still poor.

Next Step

Second Step - Home Vs. TV Mode

Is your TV setup for home mode?

If your TV is setup to store use, change it to home mode using the following steps below:

Once you have changed your TV to home mode, now navigate to YouTube, and try playing a true 4K video content again.

Still having poor image quality? Yes, the image is still poor.

Next Step

Third Step - Single or Multiple Devices

The poor image quality on the UHDTV may be caused by the incoming signal from the input devices or cables connected to your Television.

Do you experience the poor image quality on a single connected device, or on multiple devices such as a gaming console, blue ray player, and PC?

  • Important tips about cable connection:

    • Make sure all your cable ends are securely connected at both ends of the device and your television.

    • Make sure the right color ends of the cable goes into the same matching color end of the other device.

  • It is more advisable to use one connection cable over another. HDMI cables are best preferred to component cables, while component cables are more preferred over composite and coaxial.







    480P through 4K UHD.

    Blu-ray, cable/satellite box, newer game console, PC/laptop.

    Component (Red, Green, Blue)


    Up to 1080 (usually restricted to 1080i or lower).

    Blu-ray, cable/satellite box, DVD, older game consoles.

    Composite (Red, White, Yellow)


    480i (Standard Definition).

    VCR, DVD, cable/satellite box, older game consoles.



    Up to 1080i.

    Antenna, direct cable connection, VCR, DVD.

    NOTE: If your external device supports multiple connection methods (composite, component, or HDMI), use either the component or HDMI out port(s) for the best possible picture quality.

  • In some cases, your source input device such as VCR may be sending a very low resolution to your UDHTV; this may be some older devices that were produced before the invention of high definition resolutions.

    Newer devices will automatically detect your TV’s resolution, and upscale the output resolution to produce a 4K viewing experience. To detect your input device resolution, follow the quick step below:

    On the remote control, press INFO.

    Your TV will display the information of the program and the resolution of the input signal coming into the TV.

    If your device is outputting a lower resolution, you may need to contact your service provider or device manufacturer for proper instruction about how to change the output resolution settings.

  • Other picture settings related to your UHDTV are:

    • Dynamic Contrast

    • Super Resolution

    • Noise Reduction


Ryan is a Home Electronics expert and author of this help library article. Please leave him feedback below about the page.

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