My Marantz Rear Projection TV (model PV6111W) has started turning itself off. I can not turn it back on with either the TV or cable remote. The red "view timer" light on the front of TV flashes while it is off. I have unplugged TV for a couple of hours and turned it back on. It works for a few hours then turns itself off again. I can't find anything on the remote regarding a View Timer, and don't have a manual. I see a view timer is listed as a feature of my model in the 2 page brochure on your website.