Yellow blotch on screen

No it is not cheap to fix

SET uses a optical light engine--lamp which is quite hot shines into the engine---blue is first to get the light and heat and is usually first area in the lens and baffles to get damaged(loss of blue leaves red and green which equal a yellow screen.

You have a damaged light engine.

Hello there:
The best way to describe this is what is called screen burn in.
this is very common on screns that have games or pictures that arre displayed for long periods of time without being shut down just like on a computer screen when a screen saver is not used .
there is nothing wrong with the bulb.
the yellow that you are seeing is actually burned into the glass part of the projector and the lense
so if you can and feel like you can dissasemble the projector dissassemble it and locate the glass and see if you can get the yellow tint that will be on the glass and the lense off by using some rubbing alcohol and a cottomn swab
But if it wont come off you will have to replace the lense and the glass ok
Hope this is very helpful for you
Best regards Michael

I had this same problem on my Mitsubishi rear projection WD52527 model television. The optic engine was changed twice, and the blotches were still there. It turned out that it was the mirror inside the television that was causing the purple blotches. It was filthy and once the repairman took it out and cleaned it the discolorations were gone. Hope this helps
emmilinna

The optical engine has a build up of dust. This can cause yellow shapes and blotches to appear. It is no easy task on this model to dismantle and clean the engine.

Why does my picture appear yellowish on the screen? I haven't changed the bulb in at least 2 years. Does this make a difference?

Since you have eliminated the bulb, you must now carefully and meticulously clean the optics and lenses in front of the bulb.

This is probably the polarizing filter. It will need to be replaced. It should not cost very much to fix.

Hi chucri

This is most definitely not a lamp problem.

If a yellow colour in either stripes or blotches occur it is a blue LCD polarizer that needs replacement.