I don't want to upset you but this area is one that is not user serviceable and not one where you can write "replace part #1."
I have a Samsung HL-S6186WX DLP TV.
For the past several weeks now I've been hearing this loud whirring noise, been dealing with very washed out picture, and have noticed that some areas on the screen are far too dark (as in there should be dark objects there, but are too hard to see). I even placed my other TV side-by-side just to make sure it wasn't the show.
Changing the color wheel got rid of the whirring noise, but have still got the other two issues unresolved
Any help would be very much appreciated!