RCA50"DLP, grey areas

[flashpuddin]

My RCA50LPW162yx4 developed a gray stripe ( the picture is still great but shaded in that area) about 2" wide along the top of the picture. I thought the bulb was failing ,and I replaced it. While doing so the lamp compartment looked dusty, so I held a vac near the opening to remove some of it . After replacing the bulb and turning on the set ,the stripe had gone from the top ,but is now a larger section at a diagonal. I'm hoping that it is some type of dust or dirt , because it moved ,if so how do I clean the mirrors or wheel .

Jack

[Eddie]

I'm moving this post to the correct spot.

[Eddie]

[Crowell]

It sounds like you need to completely clean the back of you Tv free of mold & dust. Because it sound like you probably just moved dust around, thus still not solving you problem.
Here are some instructions on the proper way to do it. Good luck.
viewtopic.php?f=10&t=988&p=3538&hilit=can+air#p3538