Hi. Recently I purchased a Panasonic projector (second hand). Only to find that the picture contains a overall yellow color cast I found that the blue polariser had a burn mark Which caused a lack of blue in the image. This was easily determined as I found out how to access the service menu (which if your interested is activated by selecting OPTION on the main menu and keeping the ENTER button on the remote pressed for 5 seconds hey presto! the service menu is now activated.) A new polariser was fitted which didnt fix the color cast problem. My questions is what is causing the whites to appear as yellow. The blue component of the lamp seems weaker than the red and green. Could anybody shed some light on the problem. Thanks!