My lt37hvs turns off by it self

Question

My tv after a while makes a really loud noise the screen turns blue and it turns off by itself. Sometimes what is does is it goes completely dark and starts flickering and turns off. The only way I get it to turn on I go to the back of the tv and disconnect the cable from the tv (not the end that goes on the outlet) and connected back again. But when I turn it on I hear some kind of noise like if something is loose inside the tv. I have called the Olevia supper line and no help all they tell me is to disconnect it and connect it in another outlet. We have done that left the tv disconnected for three days and still turns off on its on.