No audio via HDMI cable after sleep/restart

[Nadavamd]

Hi
I'm using a Dell XPS (Intel i5) laptop with Windows 7.
Usually I connect the laptop to my LG TV by HDMI cable.
When I plugin the cable to the computer I can hear the sound from the TV and not from the computer, which is great. However, after each time that I restart the computer or just putting it to sleep, the audio switch back to the computer, and if I want to hear the audio from the TV I need to plug out the cable from the laptop and re enter it back.
Any advise on how can I make the audio to go via the TV permanently?

 

[Eduello]

Right click the small speaker icon next to your clock in the bottom right corner of your screen and select "playback devices". Right click the one with the picture of a TV and select "set as default/set default".

 

[Nadavamd]

Right click the small speaker icon next to your clock in the bottom right corner of your screen and select "playback devices". Right click the one with the picture of a TV and select "set as default/set default".

When I turn on the computer again, and go to the "playback devices" I don't see my TV as one of the options. Only after removing the HDMI cable from the computer and plugging it back in I can see the TV on the playback devices, which already set as default