What you need:-
You need a Surface HD Digital AV Adapter.
1.Turn on the TV
2.Open the Device Charm
3.tap or click Second screen.
4.tap or click the display option that you want.
5.Surface supports a minimum output resolution of 1366 × 768 and a maximum output resolution of 1920 X 1080. Check the resolution of your TV. Also check the screen resolution on your Surface. To do this, open the Search charm, tap or click Settings, then enter adjust screen resolution. The resolution should be set to 1366 X 768.