HDMI connection not working with LG7900 DVR

When I connect the DVR to Samsung UC55C7000 LED TV it does not work. However when connected to Sony lcd TV through HDMI it works fine. what do I need to do to make it work ?

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One of the things they usually ask is

To use a shiny new HDMI 1.4a cable for the test. If other HDMI things work, they point to what didn't work.

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PS. Forgot the other.

Be sure to try resetting the source to defaults and power both off, remove AC cords and wait before power up.

Why? Because HDMI is a "protected" link, you can find times it fails to work.

OPINION -> HDMI is not consumer friendly.

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