The first Samsung DLP went out in a week, took it back got another. now a year later i have a slight bright to dim in the picture. the picture goes bright and dim slightly every few seconds. anyone know if the bulb would cause this problem? it does it on DVD tv or a blank screen. before i bought it i heard good things about them, but im disappointed. btw, if i turn it off for a while its ok till a few hours later. at 1st some days it would do it and other days it would be fine. anyone experience similar problem with there Sam DLP?