Did you try the SERVICE ISSUES at the top of the post?
And the cost to repair varies on location and model. I've seen costs from 500 to 1K.
I am having white dots showing up on my 3 year old Samsung DLP (HLT6756WX/XAA) TV. From reading some of the posts, Samsung is replacing the DMD chip on some models, but not other models. My model is one that Samsung feels there have not been "enough" defective chips to warrant favorable treatment (free repair). Has anyone with this model been able to get their TV repaired for free from Samsung? If not, approximately what has been the cost to repair this problem?