I acquired a 2nd hand Samsung LE46B550a5W TV where the picture comes on but after 15 seconds goes off but sound continues normally. You need to restart the TV to get the picture back, you cannot get any display once the picture goes. Apparently one of the power save modes is picture off which is what this appears to me to be. Wondering how I reset it to normal TV. The 15 seconds is barely long enough to get the menu up.