when i connect my sony bravia tv with my PC i can see evrything perfectly but no sound comes when i play a movie or video. wha

Hi,

Check if HDMI output is set as the default playback device.
- Right click on the speaker icon and select Playback Devices.
- If HDMI or the name of your LCD TV is listed right click on it and select Set Default.
- Do try playing another movie and it should work.