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Fix a TV that has HDR that will not work

We'll check source output, HDMI cable, TV input mode, and content—or tell you when to call a technician.

Troubleshooting · Home electronics
10–20 min
What you'll need
  • TV remote
  • HDMI cable (High Speed or Ultra High Speed)
Step 1 of 7

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Steps

Goal: Confirm the symptom, check source output and cable, then rule out TV settings and content.

Check source and cable

Goal: Confirm the source outputs HDR and the cable supports it.

  • Open the source device display or video settings. Set output to HDR, Auto, or Enhanced.
  • Use an HDMI cable labeled High Speed or Ultra High Speed. Reseat at both ends.
  • Good: Source outputs HDR and cable supports it. Proceed to Check TV settings.
  • Bad: Source not set or cable unknown—fix source and try a known-good cable.

Check TV settings

Goal: Confirm the TV input mode and HDR settings allow HDR.

  • Open TV Settings > Input. Enable Enhanced or HDMI 2.0 for the HDMI port you use.
  • Confirm HDR is On or Auto in picture settings.
  • Good: TV input mode correct. HDR activates. Done.
  • Bad: Still no HDR—power-cycle to reset HDMI handshake, or call a technician.

When to get help

Call a TV repair technician if:

  • HDR works on one source but not another with the same cable and settings.
  • The TV never shows HDR with a known HDR source after all checks.

Verification

  • HDR activates when playing HDR content—picture has wider brightness and color range.
  • The source is set to output HDR.
  • The HDMI cable is High Speed or Ultra High Speed and firmly connected.
  • The TV input is set to Enhanced or HDMI 2.0 for that port.

Escalation ladder

Work from the device outward. Stop when the problem is fixed.

  1. Source output Confirm source outputs HDR; enable in source settings.
  2. HDMI cable Use High Speed or Ultra High Speed cable; reseat.
  3. TV input mode Enable Enhanced or HDMI 2.0 for the port.
  4. Power-cycle Unplug TV and source for 30 seconds; plug back in.
  5. Call a pro HDR does not work with known HDR source after all checks.

What to capture if you need help

Before calling support or posting for help, have these ready. It speeds everything up.

  • TV model
  • Source device (streaming stick, game console, etc.)
  • HDMI cable type
  • Steps already tried

Is the source set to output HDR?

Source must output HDR.

Open source device display or video settings. Set to HDR, Auto, or Enhanced. Yes: check cable. No: enable, then test.

Yes No

You can change your answer later.

Enable HDR on source and test

Set source output to HDR or Auto. Test. If HDR appears, done. If not, check cable and TV input mode.

Done

Is the HDMI cable High Speed or Ultra High Speed?

Older cables may not pass HDR.

Check cable label. Use High Speed or Ultra High Speed. Reseat at both ends. Good cable: check TV input mode. Unknown or old: try a known-good High Speed cable.

Yes No

You can change your answer later.

Try different cable and test

Use a High Speed or Ultra High Speed HDMI cable. Reseat. Test. If HDR appears, done. If not, check TV input mode and power-cycle.

Done

Is TV input set to Enhanced or HDMI 2.0?

Some TVs need Enhanced mode per port.

Open TV Settings > Input. Find HDMI port settings. Enable Enhanced, HDMI 2.0, or similar. Enabled: power-cycle. Disabled: enable, then test.

Yes No

You can change your answer later.

Enable TV input mode and test

Enable Enhanced or HDMI 2.0 for the HDMI port. Test. If HDR appears, done. If not, power-cycle and confirm content is HDR.

Done

Power-cycle and confirm content

Unplug TV and source for 30 seconds. Plug back in. Confirm content is HDR (check app or game). If HDR appears, done. If not, call a technician.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would TV HDR not work?
Source not outputting HDR, cable does not support it, TV input not set to Enhanced, or content is not HDR. HDMI handshake can also fail.
Can I fix HDR that will not work myself?
Yes. Check source output, HDMI cable, TV input mode, and content. Most issues are settings or cable related.
When should I call a technician?
If HDR works on one source but not another with the same cable and settings, or the TV never shows HDR even with a known HDR source. The HDMI board may need repair.

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