Windows 7 does not detect HDMI connection PC to TV
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  1. Is the HDMI on the motherboard or through another graphics card?

    Are the drivers installed?

    Do you have the TV on the PC mode or computer mode as specified in it's manual?
  2. I have had (edited) my HDMI connection from the PC to the TV stop working. removing the HDMI cable from the TV and re-inserting solved it. I hope it is that simple of a fix for you.
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