twisted1272,
I'm sorry to hear that you're having this issue.
It's difficult to diagnose televisions without being able to inspect it. Since it may become progressively worse, you may want to have the unit inspected while you can still "demonstrate" the symptom for a technician. They will probably know quickly what the diagnosis would be.
--HDTech
LN52A850 TV is around 2 years old and noticed a few weeks ago that when i turn it on, the center of screen is a little dark and right half of screen is jumbled looking and after a few minutes it goes to normal. or if i tap on the back of the tv it will go back to normal. any idea what this could be?

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