Samsung PN51E6500EFXZA - Manual (Page 637)

back of your Plasma TV is too close to
a wall or other hard surface. Also, try
rerouting your connection cables.
An improperly installed wall mount can
also create excessive noise.
Image Retention (Burn In) Issue.
for PDP TV
To minimize the possibility
of screen burn, this unit is equipped
with Pixel Shift screen burn reduction
technology. Pixel Shift lets you set the
picture so it moves slightly up and