I have a 2005 44HM85; the lamp was replaced about a year ago. Now when I turn it on, I can hear the disk start spinning, the status light flashes green and in the back I can see the bulb come on briefly, then after 5-10 seconds again comes on briefly, then the tv shuts down. Screen remain black the whole time. Any ideas what may be the problem? Could replacing the lamp solve this problem?