This suggestion did not work for me, but it did give me a starting point, so thank you. We had to replace the DMD chip (white dot issue) and Samsung said our model was not covered. After replacing the chip, our alignment was off, so we googled your site. We followed the response from mrtired citing to tweak the spring-tension screws, but this did not help our situation. After trying this, we tweaked the 3 gold screws and was able to get the picture aligned.
So, I would suugest you try mrtired's suggestion, and if that does not work, then try and loosen the 3 gold scews (in a triangle pattern on the same bracket) and physically adjust the DMD board,
Good luck!