TV cuts itself off
It may be overheating. Check the temperature with your hand by placing it over the fans/slots to feel for any excessive heat. If it won't turn back on until it cools, then it's a heat issue. You could help that out by using fans to circulate the air around the unit, trying to keep it cool by moving the hot air released from it and pulling in cooler air. Other than that, there may be a short somewhere, or maybe even a broken fan.