No sound on TV when using HDMI cable from MAC

Hi
Anyone any ideas why I cant get any sound on the TV when I plug the HDMI cable in - It only comes thru on my MBP.
Also, I have to scroll the mouse off screen and grag any windows off screen in order for them to display on the TV .... It must be smething to do with resolution or something...But I cant work it out
Any help gratfully received
Thanks
Emma

To get sound you will have to tap into the audio output port. This will require a 'Y' connector with a compatible plug that fits the port and splitting into the two audio channels with RCA connectors. The image shows a possible type you can use, but you would still need two male/male RCA connector extensions to your TV. A little search on the Internet should enable you to identify the most practical way of connecting audio.
The ideal set up is to use the extension shown with a Y connector with male out put connectors.
Ciao.

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No sound on TV when using HDMI cable from MAC

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