Hello, I have a Mitsubishi DLP HDTV model WD-Y577 and over the last few weeks small pin head sized white dots have started appearing on the screen 3 as of today. None of the dots are in close proximity to one another and they appear as soon as the television is turned on and are always in the same location as the day before. Has anyone else with this model experienced the same issue and how was it resolved for you?