HDR doesn't just 'turn on'. The TV input, the HDMI cable, and the streaming device all have to agree, and most TVs ship with the enhanced HDMI mode switched off. This guide walks the chain end to end.

What you'll need

  • An HDR-capable TV
  • A streaming device that outputs HDR10, HDR10+ or Dolby Vision
  • A high-speed (18 Gbps) or ultra high-speed HDMI cable

The steps

  1. Enable the enhanced HDMI mode on the TV

    Every brand hides this under a different name: Samsung calls it 'Input Signal Plus', LG calls it 'HDMI Deep Color', Sony uses 'Enhanced format', TCL and Hisense say 'HDMI 2.0 format' or 'EDID'. Find it in the TV's general or external-device settings and turn it on for the HDMI port your streamer uses.

  2. Check your HDMI cable

    Cables from the last several years are usually fine. If the picture drops out or sparkles at 4K HDR, swap in a cable certified 'Premium High Speed' (for 4K60 HDR) or 'Ultra High Speed' (for 4K120 and 8K).

  3. Set the streaming device to automatic

    On Roku: Settings > Display type > Auto detect. On Fire TV: Settings > Display & Sounds > Display > Video Resolution > Auto. On Apple TV: Settings > Video and Audio > Format > 4K Dolby Vision, then run Check HDMI Connection. On Google TV: Settings > Display & Sound > Resolution > Auto.

  4. Verify with real content

    Play a known Dolby Vision or HDR title (Netflix, Disney+ and Prime Video label them). Press the info or display button on your TV remote — it should report HDR, HDR10+, or Dolby Vision while the title plays.

  5. Fix washed-out colors if they appear

    Washed-out HDR almost always means a mismatch: the device is forcing Dolby Vision onto a TV that only supports HDR10, or the TV's enhanced mode is off. Return to step one and set the device back to automatic.

Worth knowing

  • Apple TV's 'Match Content' settings (Match Dynamic Range and Match Frame Rate) prevent the menu from forcing HDR all the time.
  • Dolby Vision and HDR10+ are mutually exclusive per title; your device picks whichever the TV and the app support.
  • If your TV has one 'best' HDMI port (often HDMI 1 or the 2.1 port), give it to your primary streamer.

Common mistakes

  • Judging HDR by the home screen — menus often render in SDR by design.
  • Forcing 4K Dolby Vision output on a TV that doesn't support it.
  • Blaming the TV when the cable can't carry the signal.

Research basis: Roku, Fire TV, Apple TV 4K and Google TV devices with HDR-capable TVs. Steps checked against current manufacturer documentation as of the last-updated date above.