Is it there on different source inputs? It could be a light engine issue and repair would be almost, if not higher than buying a new pj. Probably not a diy repair. You might try a different cable, and or bulb, if you have one as well, but it doesn't look good.
thanks for you answer.
there is no other source inputs. i recently replace the bulb with a new one, this problem show on the old bulb also.
i'll try to replace the cable and see what happen.
again thank you very much