Hi,advice please.I am British and live in rural Japan,English advice is hard to get! I want to watch You tube videos on my 40 inch Sony Bravia TV.The store where I bought my PC ,an i mac desktop OSX 10.4,suggested I buy Mini Display Port to connect to an HDMI cable High speed type,1080P which I also bought.Not cheap even in Japan!! All connected up but nothing on TV screen.Also I suspect I also need another cable for sound.I called the store where I bought all my gear for advice,and I am still waiting.It seems they don't stock i macs anymore although they do have a manual for such. I am NOT by any means good with computers etc,so talk me through simply please!I imagine I will have to change some settings somewhere. Thanks!