1. Check the cables connected to your TV and able sure they are fully and securely inserted.

2. Make sure the core power is switched on and the connections are set correctly.

3. Perform a soft reset of the TV or if this fails a factory reset.

4. Test another device connected through the same cables to the TV to confirm it is working correctly.

5. Check the firmware of your TV and ensure it is up to date.

6. Contact the TV’s manufacturer for further assistance.