Assuming you mean you are trying to get your PC output to your receiver (audio) and TV (video), you need to take the output from your graphics card (HDMI) to an HDMI input on your 5.1 receiver. Then take the output from your receiver (HDMI) to an HDMI input on your TV.
Assuming you mean you are trying to get your PC output to your receiver (audio) and TV (video), you need to take the output from your graphics card (HDMI) to an HDMI input on your 5.1 receiver. Then take the output from your receiver (HDMI) to an HDMI input on your TV.