Thanks for your answer. I have tried now the eco mode, and in this mode there is no problem. I have also tried to clean it With pressured air from the the placement where the lampe is installed but without any result in normal mode.
Dear, have a video projector that I have used for about 40 hours. But I didn t use it for years after that. When I used it again many years after letting it in its case, few minutes after turning on, it give some Kind of purple patchs.
I publish a link to youtube to let you see how it looks. If...