Search guides

Fix a TV that has no signal

We'll check input, source, cable, and power-cycle—or tell you when to call a technician.

Troubleshooting · Home electronics
5–15 min
What you'll need
  • TV remote
  • HDMI cable (if using external source)
Step 1 of 5

Quick triage — pick your path

Get started

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

Show full guide

Steps

Goal: Confirm the symptom, check input and source, then rule out cable and handshake issues.

Check input and source

Goal: Confirm the correct input is selected and the source device is on.

  • Use the TV remote to cycle through inputs—HDMI 1, HDMI 2, HDMI 3, etc. The source must be connected to the input you select.
  • Confirm the source device is powered on and outputting. Wake it if it is in sleep mode.
  • Good: Correct input selected and source is on. The signal appears. Done.
  • Bad: Still no signal—proceed to Check cable and ports.

Check cable and ports

Goal: Rule out loose or faulty HDMI cable and bad ports.

  • Unplug the HDMI cable at both ends. Plug it back in firmly. Try a different HDMI port on the TV if one port fails.
  • Try a known-good HDMI cable. A faulty cable is a common cause of no signal.
  • Good: Cable reseated or replaced. The signal appears. Done.
  • Bad: Still no signal—proceed to Power-cycle.

Power-cycle

Goal: Reset HDMI handshake between TV and source.

  • Unplug the TV and the source device from power. Wait 30 seconds. Plug both back in. Turn on the source first, then the TV.
  • Good: Power-cycle fixes the issue. The signal appears. Done.
  • Bad: Still no signal on all inputs—check source output settings or call a technician.

When to get help

Call a TV repair technician if:

  • You have checked input, source, cable, and power-cycle and the TV still shows no signal on all inputs with a known-good source and cable.

Verification

  • The TV shows a picture from the selected source.
  • The correct input is selected.
  • The HDMI cable is firmly connected at both ends.
  • The source device is on and outputting.

Escalation ladder

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

  1. Input and source Select correct input; confirm source is on.
  2. Cable and ports Reseat cable; try different port and cable.
  3. Power-cycle Unplug TV and source for 30 seconds; plug back in.
  4. Source output Check source resolution or output settings.
  5. Call a pro No signal on all inputs 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 (cable box, streaming stick, etc.)
  • Steps already tried

Is the correct input selected?

Wrong input shows no signal.

Use the TV remote. Cycle through inputs—HDMI 1, HDMI 2, etc. Select the input where the source is connected. Correct input: check that the source is on. Wrong input: select correct one, then test.

Yes No

You can change your answer later.

Select correct input

Select the input that matches your source (e.g. HDMI 1 for cable box). Confirm the source device is on. If signal appears, done. If not, reseat cable and try different port.

Done

Is the source device on and outputting?

Cable box, streaming stick, or game console must be on.

Check the source device. Wake it if it is in sleep mode. Wait a few seconds for it to output. On and outputting: reseat cable. Off or sleeping: turn it on, then check input again.

Yes No

You can change your answer later.

Turn on source and select input

Turn on the source device. Select the correct input on the TV. If signal appears, done. If not, reseat cable and power-cycle.

Done

Reseat cable and try different port

Unplug HDMI at both ends. Plug back in firmly. Try a different HDMI port on the TV. Try a different cable if available. Power-cycle: unplug TV and source for 30 seconds, plug back in. If signal appears, done. If not, call a technician.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would a TV show no signal?
Wrong input selected, source device off or not outputting, loose or faulty HDMI cable, or handshake issue. The TV is on but not receiving a signal from the source.
Can I fix a TV with no signal myself?
Yes. Check input selection, confirm the source is on, reseat the cable, and power-cycle. Most no-signal issues are input or cable related.
When should I call a technician for no signal?
If you have checked input, source, cable, and power-cycle and the TV still shows no signal on all inputs. The HDMI board or input port may need repair.

Rate this guide

Was this helpful?

Continue to