I have a mitsubishi DLP tv that has started randomly shutting itself off. When it shuts off the green light will slowly blink while the lamp cools down just like it does if you shut it off. As soon as it quits blinking you can turn it back on and it may not do this again for days. Other times it may do it two or three times a day. I cleaned the filters and fans even though I didn't think it was overheating. I also replaced the lamp with an Osram but it still does this. It has a great picture and we love it but it gets a little annoying when it does this especially if it is right in the middle of something you would like to see. Since there are fewer and fewer techs that work on DLPs I'm hoping someone on here might be able to give me some guidance as to what could be the problem. I'm leaning towards the power supply but can't understand why it doesn't do this on a regular basis. Any help would be greatly appreciated.