I have a Samsung R5067 that will automatically shut down . There are no “overheat”, “fan” or "lamp" indicators that come on when it happens. Sometimes when I turn it back on after it shuts off it is fine. Other times I have to turn it back on 3-4 times since it will keep shutting down. Sometimes it may happen once a week and at other times it will act up 4-5 times per week. The unit is about a year or so old, it has always been in the same location and the room temperature has nothing to do with it. I have tried resetting it by unplugging the unit for 30 seconds but the problem returns. ANY SUGGESTIONS ?