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Fix a TV that has channel that will not scan

We'll check antenna connection, scan settings, and signal—or tell you when to call a technician.

Troubleshooting · Home electronics
10–30 min
What you'll need
  • Antenna connected to TV
  • TV remote
Step 1 of 5

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Steps

Goal: Confirm the antenna is connected, the TV is set correctly, and the scan runs properly.

Check antenna and settings

Goal: Confirm the antenna is connected and the TV is set to Antenna / OTA mode.

  • Check the antenna cable is plugged into the Antenna In or RF port—a single round coaxial connector. Not HDMI.
  • Open TV Settings. Find Channel, Tuner, or Signal Source. Set to Antenna, Air, or OTA—not Cable.
  • Good: Antenna connected and TV set to Antenna. Proceed to Run Full scan.
  • Bad: Wrong port or Cable mode—fix those, then scan.

Run Full scan

Goal: Run a channel scan that finds all available channels.

  • Open Channel Setup, Channel Scan, or Auto Program. Choose Full, Complete, or Full Scan—not Quick.
  • Start the scan and wait—it can take several minutes. Do not turn off the TV.
  • Good: Channels are found. Done.
  • Bad: No channels or scan fails—proceed to Check antenna position.

Check antenna position

Goal: Improve signal so the scan can find channels.

  • Use antennaweb.org or fcc.gov/media/engineering/dtvmaps to find tower direction.
  • Move the antenna near a window, higher up, aimed toward towers. Check signal strength in TV Settings if available.
  • Try a different coaxial cable or antenna. Power-cycle the TV and rescan.
  • Good: More channels found. Done.
  • Bad: Still no channels in an area with known OTA coverage—call a technician.

When to get help

Call a TV repair technician if:

  • The antenna is connected correctly, the TV is set to Antenna, you have run a Full scan with a known-good antenna and cable, and you are in an area with known OTA coverage.

Verification

  • The channel scan completes and finds channels.
  • Channels appear in the channel list and can be tuned.
  • Signal strength in the TV menu is adequate (if shown).

Escalation ladder

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

  1. Antenna and port Confirm antenna connected to Antenna In; set TV to Antenna/Air.
  2. Full scan Run Full or Complete channel scan; wait for it to finish.
  3. Antenna position Move antenna; aim toward towers; check signal strength.
  4. Cable and power-cycle Try different cable; power-cycle TV; rescan.
  5. Call a pro Tuner may need repair if all else fails.

What to capture if you need help

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

  • TV model
  • Antenna type (indoor/outdoor, amplified)
  • Whether TV is set to Antenna or Cable
  • Signal strength (if TV shows it)
  • Steps already tried

Is the antenna connected to the Antenna In port?

The antenna uses a coaxial cable to the RF/Antenna port—not HDMI.

Check the antenna cable is plugged into the Antenna In or RF port on the TV. Connected: set TV to Antenna/Air and run Full scan. Not connected or wrong port: connect to Antenna In, then scan.

Yes No

You can change your answer later.

Connect antenna and scan

Plug the antenna into the Antenna In (RF) port. Set TV to Antenna/Air. Run Full channel scan. See fix-tv-has-antenna-will-not-work if antenna has other issues.

Done

Is the TV set to Antenna or Air (not Cable)?

Cable mode expects a different signal; scan will fail.

Open TV Settings > Channel or Tuner. Set source to Antenna, Air, or OTA. Antenna: run Full scan. Cable: change to Antenna, then run Full scan.

Yes No

You can change your answer later.

Set to Antenna and scan

Change TV to Antenna/Air mode. Run Full or Complete channel scan. Wait for it to finish.

Done

Run Full scan and check antenna position

Run Full or Complete scan—not Quick. Move antenna near a window, higher up, toward towers. Check signal strength in TV menu. Power-cycle and rescan. If still no channels in an area with known OTA coverage, call a technician—tuner may need repair.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would a TV channel scan fail or find no channels?
Antenna not connected or connected to wrong port, TV set to Cable instead of Antenna, weak signal, antenna in wrong position, or scan type (Quick vs Full) skipped channels. Some areas have very weak OTA signal.
Can I fix channel scanning myself?
Yes. Check antenna connection, set TV to Antenna/Air, run a Full scan, and adjust antenna position. Use a signal strength website to confirm towers are in range.
When should I call a technician?
If the antenna is connected correctly, TV is set to Antenna, you have run a Full scan, and you are in an area with known OTA coverage but still get no channels. The tuner may need repair.

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