Have a three year old Mitsubishi WD60735 dlp tv. About a month ago the picture started to get noticeably dark even with contrast and brightness turned all of the way up. I figured that it was a lamp issue so I replaced the lamp. However, there is no noticeable difference between the old and new lamp. Any other suggestions?
Brand new lamp, and cleaned the front lens (removed the screen) and cleaned the lens that abuts the lamp, I opened the back and found massive amounts of dust, went a few layers down but stopped at what I think is the light engine, couldn't access any more lenses.
It was over a several month period. It wasn't bad at first, I just noticed that I had to turn up the brightness a few notches and that would return it to normal. But once I had turned the brightness up full it became very noticeable quick. It went from normal looking (maybe a little dark in a bright room) to unwatchable within about 3 weeks.