No picture on tv, nor sound? Maybe your TV doesn't have picture because you forgot to turn it on. All you need to do is to turn it on and the TV should start working, i.e. you should see picture on the screen.
If your TV doesn't have picture and you are not sure what to do, contact your device manufacturer's customer support team, which you can get on their website, the instructions manual, etc.
Also, you can contact them online, through their website, provided that they have one.
If you don’t receive the email in the next 2 minutes please check your junk folder, and add [email protected] to your safe sender list.