Cannot get any power to the tv - it is not the fuse in the mains plug, not the mains cable as both work ok elsewhere. Do not know if the tv is switched on or off at the side as no standby light showing at all. It did this a few days ago but swapped the plugs around and it worked very well until the next time I turned it off and then it would not turn on again. Tried the same again but no response at all.