You have not handled many of these then .. LCD is always lighter than
plasma . In fact all the plasma sets i have worked n all had solid cast
metal frames for the screens . LCD do not have such structures for the
screen .

I just worked on a Pana.... Plasma dated Dec. 05 with a 2 inch wide bar
in the picture .. bad screen on that .
A second Pana... plasma with bad back lights . This model they built the
lights in with the screen and will only sell lights & screen as one unit
..

I have run across a few non working LCD sets and it was never the screen
... yet ...