My c55d not play sound on TV connected to the notebook.

Hi there,
When I connect my notebook via cable hdmi to digital TV sound is heard from the speakers but not on TV.
It worked well before, not now.
Everything is connected, I tested with new cables. It is well configured.
In the devices it appears as no connected.
Please help?

make sure the sound isnt muted and make sure your iphone isnt on vibrate

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To get your issue more exposure I would suggest posting it in the commercial forums since this is a commercial product. You can do this at Commercial Forums.
Even though this is a Commercial product, I would try these fixes.
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I'm having trouble getting older, embedded QuickTime files to play properly. Many of them do play but without sound.
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My c55d not play sound on TV connected to the notebook.

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