Advice to all LG PK550 owners / potential buyers. LG is prone to temporary IR. Most of it is not due to actual display content but the TV menus. It left a very visible after-image that had me worried. Be sure to keep the contrast and colors <= 50 plus disable anything that reads "dynamic". Use the Colorwash option in between.
Check if you see a overall glow in the screen with channel logo etc visible after you switch OFF the TV. If it is visible, 2010 model LGs are no better than 2009 models when it comes to IR.
This I not not find in samsung and panasonics.
Also, if you can, run a screen saver of bouncing text etc and let me know if they leave a trail.
Thanks in advance.