There I was thinking I had a bargain with my £900 barco graphics 800 when I noticed a problem! There is a very faint blue bar running right down the centre of the projected image , from top to bottom.This is more obvious if the projected background is near white. It happens whatever input I select for the projector. I have looked into the blue tube with a torch and cannot see any evidence of burn in. In any case this would seem a strange pattern of burn in to me...I thought it usually occured as a result of highly intense image spots...such as on logos. The blue line is only noticeable if you know it is there and actively look for it ( which of course you do because you know its there ! ). It is also less visible if you sit at a direct right angle to the screen. Perhaps I am being fussy?