Televisions covered: all Projection with yellow picture, but not Projection TVs with a yellowish tint surrounding objects in a nearly normal picture.
Yellow = red + green
normal picture = red + blue + green (RGB). See illustration.
Fig. 1 Additive color mixing in an RGB monitor, or RGB Projection TV.
The circuitry powering your blue output, or the blue light engine itself is starting to fail.
Operating Theory:
The lamp module shines a bright light into the optical unit; there
are a series of lens and baffles, and at the top of the light engine, a lens
puts the picture into a mirror which is reflected onto the screen; All video
and color is processed thru the light engine. Blue most commonly fails first, leaving a yellow picture.
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