^^ R u sure that there is Screen burin & Not Image Retention on ur tv?
Image Retention is "Temporary" which can be done away with various inbuilt Antiburn Screen Burn Protectiontools in the tv,..while Screen Burn in is "Permanent" & is a serious problem which might night be possible to ward off altogether...
However to reduce the possibility of screen burn, the d550 is equipped with various Screen Burn Protection Methods . For start, there is Pixel Shift screen burn prevention technology. Pixel Shift moves the picture slightly on the screen.The Time function setting allows you to program the time between movement of the picture in minutes.
Your TV also has the following additional screen burn protection functions:
?? Pixel Shift
?? Auto Protection Time
?? Scrolling
?? Side Gray
If u r unsure whether ur tv has IR or SB, try the above scrolling tool for 1-2 hours w/o break & then try to find the errors again which u earlier found.if u find the errors i.e sb again,repeat the above scroll tool but for much longer duration..& then chk agin..if u stil find something...its probably Screen Burn in!.However,if its Not so distinguishable, then dont panic & try 2 use r tv as normal with moderated pic settings.. last heard..many tough SB also gets resolved in time!