Why is my Smart TV not displaying HDR content properly?

Check that your TV supports HDR.
Ensure that your manufacturer supports HDR-capable televisions before trying to enable HDR on your TV.

Make sure your TV is set to HDR mode.
On your TV settings, be sure to select ‘HDR’ or ‘Enhanced Format’ video mode.

Enable HDR on both your TV and streaming source.
Enable High Dynamic Range in both your TV’s settings and the source device’s settings (e.g. streaming device, Blu-ray etc.)

Check that you’re streaming HDR content.
In order for HDR content to display correctly, it has to be available where you’re streaming from (Netflix, YouTube, etc). Be sure to check your streaming service supports HDR.