turning off laptop while TV in use

so my family just bought a new 55" LED television and I'm just itching to play with it on my Asus G73JH. HIDMI connection works flawlesly, but the laptop video and audio remains on. I'd like to turn both off and have both come from my television (which has 5.1 surround speakers connected to it) and I know on most laptops that support external video there is a keyboard command that lets you do this but I cant find the keyboard command on this model. Any ideas?

 

Fn-F8 to cycle through three modes: LCD/HDMI/HDMI+LCD

If you have trouble getting the audio to automatically switch to HDMI instead of speakers, then make sure you're using the "ATI HDMI Audio Device" R2.49 driver from Realtek.

 

Any Realtek driver since 2.49 should work fine. If by switching with Fn+F8 don't work, in your audio devices select HDMI Input. that would do.

 

fn+f8 works, I went ahead and selected the HDMI in audio and that did work, now here's another dillema that might be better posted to an audio/video forum but I'll give it a shot here. My Audio Receiver does not support HDMI so I basically am having to go straight HDMI to the television and use the televisions speakers for sound. Is there any way I can get that audio to go to my reciver? The Television does have an optical port and so does my reciever so I'm wondering if I can go HDMI from the laptop to the television, then go optical from the telvision to the receiver to get the audio pumping through the surround speakers?