Sound doesn't work while watching some video links

  InTechBarb 14:25 17 Jul 2013

Sometimes when I click on a link to a video, I can only see the video, but I cannot hear anything -- very annoying. For example, I belong to a yahoo group and one of the people on the group posted a link to a video. I can see it but I can't hear it.

I know my sound card works and the sound is turned on and adjusted to almost half way.

I have an Acer laptop and using Windows 7.

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