I bought a 50" LCD RPTV 6 months ago. Really love it. However, I have just begun noticing a triangular white "shadow", which starts in the center of the screen and widens out toward the bottom of the screen. It is not a reflection from lighting in the room, nor anything that can be cleaned off the screen, from the outside at least. The shadow is most noticeable with the TV turned off, but it is barely noticeable, especially when watching a dark/nightime image on the screen.
Is this some sort of burn in from the internal lamp. Anyone seen this before?