1. Check if your TV is connecting with the right HDMI connection by pressing ‘source’ or ‘input’ button on your remote.
2. If it is connected to the right port check the sound and video setting. Make sure that sound is not muted and volume is turned up.
3. Unplug your TV and check to make sure all cables are connected securely and firmly to the right ports.
4. Check to make sure your TV is set to the correct resolution.
5. Check to make sure that any filters, like automatic sizing, is turned off.
6. Change the aspect ratio 4:3 or 16:9 settings on the TV.
7. Update or restart the TV firmware.