Hello
@Luvnluvn ,
Let's try to get you connected up.
This is often a case of WiFi networks. Make sure your TV and Surface Book are on the same ethernet or WiFi network, which also means you cannot connect one through a repeater or extender without also doing the other.
Also, Samsung and Vizio TVs have been known to fail after first working, because the "Source" switching expects a certain voltage on the HDMI port, and that level is not necessarily met every time. If the voltage does not meet the threshold, the connection is not made. The solution is to power off the TV, remove the Mini Display Port, Power on the TV, then attach the Mini Display Port. Then try your connection again. You may need to repeat this process. Eventually, the correct voltage is reached.
If that is not the problem, then do this:
- Right-click on the list of WiFi networks you have available to your Surface Book, and choose "Forget".
- Re-connect to the network the TV is sharing
Let us know.