- Verify that the TV is switched to the correct HDMI port and that the cable is securely connected.
- Make sure the cable is plugged in tightly at both ends.
- Check if all connected devices are powered on.
- Try different HDMI ports on the TV.
- Check the source device for additional settings needed to allow signal.
- Disconnect the HDMI cable from the TV and reconnect.
- Restart the TV.
- Test with a different HDMI cable.
- Perform a reset on the TV.