• I have a samsung LCD LN-40A450C1HXZA. I was not getting any sound on my HDMI inputs. I would get a picture but no sounds. I called Samsung at 1-800-726-7864. They instructed me to power off my TV and reverse my HDMI cables. I did this for both my cable box and xbox and it worked. They said if the problem continued that Imade need a firmware update. Good luck
  • i had the same problem when using hdmi with a hd cable box from time warner. you have to go into the settings of the cable box and change the audio from digital to hdmi.

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