My tv is about 2 years old Acoustic Solutions 37in Full HD Digital LCD TV bought from Argos.Today for the first time the tv started turning itself on and off .When it managed to stay on for a minute or two it would start changing channels or the volume keep going up and down.I had a Virgin Media box connected to it but i took out the scart lead and connected an aerial it ade no difference.Can you tell me what you think is wrong with this tv