My TV won't switch off even when touching the power buttom. TV plugged straight into wall & digital aerial cable connected direct to TV. What happens is Samsung Smart TV sign comes up for about a second then disappears. The red power LED light flashes for a few seconds with HDMI.. box in top left of screen then LED light stops flashing as if TV switches itself off. The whole cycle above starts again all by itself.................can some-one please help?
