I'm very sorry for any inconvenience this may have caused you. Unfortunately, this sounds like it may need servicing. Here's the thread where you can get details on setting that up: http://forums.cnet.com/7723-13973_102-542437/service-issues-click-here-for-help/
I noticed that I have three white dots appearing on my Samsung DLP with the below specifications. Unit is passed the warranty period at this time.
After researching this issue, it appears that it has fell into an obvious defective part acknowledged by Samsung, however I am not sure if this is a universal recall.
It looks like this is a settlement recall for the defective DMD" chip designed by "TEXAS INSTRUMENT'S. Most post that read indicates that Samsung will do a one time repair for this problem.
Here is my model specification.
Serial Number AHDZ3CMP50210SE
I have not called Samsung yet, can anyone confirm there outcome with this well known and documented problem by consumers of Samsung DLP Televisions under those models affected.