Are you saying you have to pay that much if it's not fixed?
I'm encountering folk that want a full breakdown of the problem, which board is going to be replaced and why. However if you gave out that information the customer might run out and find the board and your estimate and work would not create any income. This is part of the reason why such detail is not given.
-> What's odd about your post is the mention of the DMD chip. Isn't that used on projection systems?
http://reviews.cnet.com/flat-panel-tvs/samsung-hp-s5053/4505-6482_7-31628177.html seems to show this as a Plasma.
I have called tech support now many times --- reviewed all possible issues with my equipment and cable and narrowed the issue to the Samsung TV. Enumerable dots / sparkles (white / red / green ) all over the screen --- much more visible with darker screens. Does anyone know the fix --- dmd chip --- upper lower buffers / ymain. Part numbers --- ? Samsung's authorized service estimate was $500 with no indication of part or problem. I'm not comfortable with paying this amount of money with no information. Please assist if you have a similar problem.