Success! Called Mitsubishi customer service - 1-800-332-2219. White dots on screen issue is the digital mirror chip costing over $250 for the part. Mitsubishi is sending the part, at no charge, to the closest authorized dealer who will come to my home, replace the bad part charging $200 for labor. My tv is the 735 series part # WD60735, 60", rear projection, purchased thru Amazon 12/2008. Yay.