PC Won’t Connect to TV HDMI? 8 Fixes to Try

If your PC won’t connect to your TV over HDMI, check the cable and TV input first, then review Windows’ projection settings. Common causes include a loose cable, the wrong input, an adapter or dock, or a graphics-driver problem. Try these fixes in order.

1. Check the HDMI cable and connections

Turn on both devices and push the HDMI plugs firmly into the PC and TV. Inspect the connectors and ports for damage, and replace a crushed or loose cable.

2. Choose the correct HDMI input on the TV

Use the remote’s Input, Source, or Home button. Select the port the cable uses, such as HDMI 1 or HDMI 2; the TV may not switch automatically when a computer is connected.

If you are unsure which port is in use, test each HDMI input and wait a few seconds after switching.

3. Change Windows’ projection mode

Press Windows + P to open the Project panel. Choose Duplicate to show the same image on both screens or Extend to use the TV as extra desktop space. If you want the TV to be the only screen, try Second screen only.

Wait a few seconds after selecting a mode. If the TV stays blank, try a different mode and continue to the detection step.

4. Connect the PC directly to the TV

Temporarily remove HDMI switches, splitters, docking stations, AV receivers, and USB-C adapters. Connect the PC directly to the TV with one HDMI cable. An accessory may block detection, lack video support, or be connected in the wrong direction.

If the direct connection works, reconnect accessories one at a time to find the cause.

5. Test another HDMI port or cable

Try a different HDMI input on the TV and select that input in the Source menu. If possible, use a known-good cable. You can also test the TV with another HDMI device or connect the PC to another display to identify which device is causing the problem.

If several devices fail on one TV port, the input may be faulty. If the PC fails with multiple known-good cables and displays, focus on its video output and drivers.

6. Ask Windows to detect the TV

In Windows 10, right-click the desktop and choose Display settings, or open Settings > System > Display. Under Multiple displays, select Detect. Keep the TV on the correct HDMI input while checking.

If the TV appears, select it and choose a supported resolution. If a connection that previously worked suddenly goes blank, press Windows + Ctrl + Shift + B to reset the graphics driver, then restart the PC if needed. See Microsoft’s external-display troubleshooting guide.

7. Update or roll back the graphics driver

Search for Device Manager, open it, and expand Display adapters. Right-click the graphics adapter, choose Update driver, and select the automatic search option. Also check Windows Update for available driver updates.

If Windows finds nothing, download the correct driver from your PC or GPU manufacturer—not a third-party driver site. If the problem started after a driver update, open the adapter’s Properties > Driver tab and choose Roll Back Driver if available. Microsoft’s Device Manager driver instructions explain both options.

8. Check which video port you are using

On a desktop with a dedicated graphics card, plug the TV into an HDMI output on that card—usually lower on the back of the tower—not the motherboard port beside the USB and audio connectors. The motherboard output may not be active when the PC uses a separate graphics card. Laptops and PCs without a dedicated GPU should use their supported built-in video output.

If HDMI works but something is still wrong

• Picture but no sound: Open Settings > System > Sound and choose the TV or HDMI audio device as the output.
• Blurry or cropped picture: In Settings > System > Display, choose the TV’s recommended resolution and check its picture-size setting.
• TV is never detected: Test the PC and TV separately with another cable or display. If multiple known-good combinations fail, a port or hardware fault may need service.

Bottom line: confirm the TV input, try Windows + P, bypass adapters, and test another cable or port. If Windows still cannot detect the TV, use Display settings and update or roll back the graphics driver. For more help, see Microsoft’s official guide to troubleshooting external displays.