The only way to attempt to fix this is to apply the old adage an old friend came up with: "When it's broken and what to do you don't know, you must try to reflow". LOL

Just kidding you, TheoX.

Sorry but I can't help you with your DLP problem, except lightening up the mood. What is the resolution and how close are you seating to the projected image that you can see 4 stuck pixels?