The sony projector is displaying a bluish hue on screen. One projector has it on top and another has it on the outsides in a circular manner. color correcting does not fix it. What could be the problem and how to fix it? They are about 5 -6yrs old. Thanks
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Have a very close look at the blue and see if it's perfectly uniform across the whole screen. If it is then altering the hue or colour temperature settings in the menu may help. If it's not then either there are heaps of pixel failures (appearing as small rectangular spots) or degradation of the polarisers (green may be affected more than the others). If you show the menu, do the white areas appear bluish. If the lamp is very old then colour changes start to happen.
9 times out of 10 the Blue Polarizer heats up and discolors which causes that problem, all projector's have the same issue and have for years. My professional recommendation is get in touch with Sony, they have been extending the warranty's for this issue. If they won't the have a servicer replace the light engine of which is not cheap.
I would first try a new lamp. If the reflector portion of the lamp has any defects, it could show up this way as the light would not be uniform. The next possibility is a defective light engine. The engine portion if not field repairable and would need to be replaced. Try the lamp first and let us know what happens.
The Blue dots or discolouration you are seeing is due too the Blue LCD screen having cracked from excessive heat. This normally happens when you have a power failure while the Television was on. This obviously because the Blue LCD sits next to the lamp - the main cause of heat. The correct part number on the 60" is A-1086-952-A. It is very, very ,expensive.
Sorry to have been the bearer of bad news. Good luck : )