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Fix a TV that has IR blaster that will not work

We'll check position, cable, obstacles, and TV settings—or tell you when to replace the blaster.

Troubleshooting · Home electronics
5–15 min
What you'll need
  • TV manual (for IR blaster settings and jack locations)
  • Device manual (for IR sensor location)
Step 1 of 9

Quick triage — pick your path

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Choose the option that matches what you see. You can jump straight to that section.

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Steps

Goal: Confirm the symptom, check position and cable, then rule out obstacles and TV settings.

  • Confirm the IR blaster does not relay commands—the TV remote works but the cable box, soundbar, or other device does not respond.
  • Good: You have confirmed the symptom. Proceed to Check position.
  • Bad: The TV remote itself does not work—see fix-tv-remote-will-not-work.

Check position

Goal: Aim the IR blaster at the device IR sensor.

  • Find the IR sensor on the device (cable box, soundbar)—often a small dark window on the front. Reposition the IR blaster tip to face it within a few inches.
  • Good: Blaster aimed at sensor. Proceed to Check cable.
  • Bad: Still no response—check cable and obstacles.

Check cable

Goal: Confirm the blaster cable is firmly connected to the TV.

  • Check the IR Out or IR Blaster jack on the TV. Unplug and reconnect. Confirm snug fit.
  • Good: Cable connected. Proceed to Remove obstacles.
  • Bad: Loose or damaged—reconnect or replace the cable.

Remove obstacles

Goal: Clear the path between blaster and device.

  • Glass doors, cabinet frames, or other objects can block IR. Move the blaster tip outside any cabinet or ensure nothing blocks the path.
  • Good: Path clear. Proceed to Check TV settings.
  • Bad: Path blocked—clear it and test.

Check TV settings

Goal: Enable IR blaster if required by the TV.

  • Open TV Settings > External Device, HDMI Control, or IR Blaster. Enable IR output if the option exists. Check the TV manual for your model.
  • Good: IR blaster enabled. If still no response, the blaster may be faulty.
  • Bad: Setting not found—check the TV manual.

When to get help

Replace the IR blaster if:

  • Position, cable, and TV settings are correct but the blaster still does not work. Use an OEM blaster from the TV manufacturer.

Call a TV repair technician if:

  • The TV has no IR output or multiple blasters fail—the TV IR circuit may have failed.

Verification

  • The IR blaster relays commands to the device when you use the TV remote.
  • The blaster tip is aimed at the device IR sensor.
  • The blaster cable is firmly connected to the TV.
  • The path between blaster and device is clear.

Escalation ladder

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

  1. Position Aim the blaster tip at the device IR sensor.
  2. Cable Check the blaster cable is firmly plugged into the TV.
  3. Obstacles Remove anything blocking the path between blaster and device.
  4. TV settings Enable IR blaster in TV settings if required.
  5. Replace blaster or call a pro Blaster faulty—replace. If TV IR output fails, call a pro.

What to capture if you need help

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

  • TV model
  • Device type (cable, soundbar, etc.)
  • Steps already tried

Is the IR blaster tip aimed at the device IR sensor?

The blaster must relay IR to the device sensor.

Check the device manual for IR sensor location. Reposition the IR blaster tip to face the IR sensor within a few inches. Aimed: check cable. Not sure: find the sensor first.

Yes No

You can change your answer later.

Reposition the blaster

Aim the blaster tip at the device IR sensor. Remove obstacles. Test. If the device responds to its own remote, the blaster should work when correctly positioned.

Done

Is the blaster cable firmly plugged into the TV?

Loose cable is a common cause.

Check the IR Out or IR Blaster jack on the TV. Unplug and reconnect. Confirm snug fit. Plugged: check obstacles and TV settings. Loose: reconnect and test.

Yes No

You can change your answer later.

Reconnect cable and test

Plug the blaster cable firmly into the TV IR output. Test. If still no response, check TV settings for IR blaster enable.

Done

Is the path between blaster and device clear?

Glass and obstacles can block IR.

Remove obstacles. Move blaster outside cabinet if needed. Clear: check TV settings. Blocked: clear path and test.

Yes No

You can change your answer later.

Clear path and test

Remove obstacles. Reposition blaster. Test. If device responds to its own remote, the blaster should work when path is clear.

Done

Is IR blaster enabled in TV settings?

Some TVs require enabling IR output.

Open TV Settings > External Device or similar. Enable IR blaster if the option exists. Enabled: blaster may be faulty. Not found: check TV manual.

Yes No

You can change your answer later.

Enable IR blaster and test

Enable IR blaster in TV settings. Test. If still no response, replace the blaster.

Done

Replace blaster or call a pro

If position, cable, and settings are correct and the device responds to its own remote, the IR blaster may be faulty. Replace with OEM. If multiple blasters fail, the TV IR circuit may have failed—call a technician.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would an IR blaster not work?
Wrong position (not aimed at the device IR sensor), loose cable, blocked path, or TV setting not enabled. The blaster must relay IR from the TV to the device.
Can I fix an IR blaster that will not work myself?
Yes. Reposition the blaster tip to face the device sensor, check the cable connection, and confirm TV settings. If that fails, replace the blaster.
When should I replace the IR blaster?
If repositioning, cable check, and TV settings do not fix it, the blaster may be faulty. Replace with an OEM blaster or use a universal remote with its own blaster.

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