Search guides

Fix a TV that has a PC that will not display

We'll check TV input, Windows display mode (Win+P), 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 or DisplayPort cable (or DisplayPort-to-HDMI adapter if TV has HDMI only)
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 TV input and Windows display mode, then rule out cable and handshake issues.

Check input and display mode

Goal: Confirm the correct TV input is selected and Windows is outputting to the external display.

  • Use the TV remote to select the HDMI or PC input that matches where the cable is plugged in.
  • Press Win+P on the PC and select Duplicate or Extend. When Only PC screen is selected, the TV gets no signal.
  • Good: Correct input selected and Windows set to Duplicate or Extend. The signal appears. Done.
  • Bad: Still no signal—proceed to Check cable and ports.

Check cable and ports

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

  • Unplug the HDMI or DisplayPort cable at both ends. DisplayPort has a latch; press the release button if present. Plug it back in firmly until it clicks.
  • Try a different port on the PC and on the TV. Try a known-good cable. If the PC has DisplayPort and the TV has HDMI only, use a DisplayPort-to-HDMI adapter.
  • Good: Cable reseated or replaced. The signal appears. Done.
  • Bad: Still no signal—proceed to Power-cycle.

Power-cycle

Goal: Reset display handshake between TV and PC.

  • Unplug the TV and the PC from power. Wait 30 seconds. Plug both back in. Turn on the PC first, then the TV.
  • Good: Power-cycle fixes the issue. The signal appears. Done.
  • Bad: Still no signal—try a lower resolution in Windows display settings or call a technician.

When to get help

Call a technician if:

  • You have checked input, Win+P display mode, cable, port, and power-cycle with a known-good cable and the PC still does not display on any TV input.

Verification

  • The TV shows a picture from the PC.
  • The correct TV input is selected.
  • The HDMI or DisplayPort cable is firmly connected at both ends.
  • Windows is set to Duplicate or Extend (Win+P).

Escalation ladder

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

  1. Input and display mode Select correct TV input; press Win+P, choose Duplicate or Extend.
  2. Cable and ports Reseat cable; try different port and cable.
  3. Resolution and power-cycle Try lower resolution in Windows; power-cycle TV and PC.
  4. Call a pro PC does not display 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
  • PC model and graphics card
  • Cable type (HDMI, DisplayPort, adapter)
  • Steps already tried

Is the correct TV input selected?

Wrong input shows no signal.

Use the TV remote. Select the HDMI or PC input where the cable is plugged in (HDMI 1, HDMI 2, etc.). Correct input: check Windows display mode. Wrong input: select correct one, then test.

Yes No

You can change your answer later.

Select correct input

Select the TV input that matches your PC connection. Press Win+P on the PC and select Duplicate or Extend. If signal appears, done. If not, reseat cable and try different port.

Done

Is Windows set to Duplicate or Extend?

Win+P opens the display mode menu.

Press Win+P on the PC. Select Duplicate or Extend. Duplicate or Extend: reseat cable. Only PC screen: change to Duplicate or Extend, then check input again.

Yes No

You can change your answer later.

Set Duplicate or Extend and select input

Press Win+P, select Duplicate or Extend. Select the correct TV input. If signal appears, done. If not, reseat cable and power-cycle.

Done

Reseat cable and try different port or cable

Unplug cable at both ends. DisplayPort: press release button before unplugging. Try a different port on PC and TV. Try a different cable. Power-cycle: unplug TV and PC 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 PC not display on a TV?
Wrong TV input selected, Windows not set to output to the external display, loose or faulty cable, or incompatible resolution. Win+P lets you choose Duplicate or Extend.
Can I fix a PC that will not display on a TV myself?
Yes. Check TV input, press Win+P to set Duplicate or Extend, reseat the cable, and power-cycle. Most issues are input selection or Windows display mode.
When should I call a technician for a PC that will not display on a TV?
If you have checked input, Win+P display mode, cable, port, and power-cycle with a known-good cable and the PC still does not display on any TV input. The graphics card or port may need repair.

Rate this guide

Was this helpful?

Continue to