i turn the tv on and it flashes hisense on the screen and turns back off. it repeatedly comes on and off over and over like that until i unplug it. it has proper area around the tv for ventilation. and just started doing it yesterday for reason. But the hisence light at the botton of the tv that stays lit is still on. but instead of one flash showing the tv was turned it. it to flashes on and off the whole time the tv is turning itself on and off