Hoping someone can help. Was watching my plasma screen last night, no problems at all. Came down this morning, and it wouldn't switch on. It seems to be on stand by as the light is flashing but it wont respond to the remote or the buttons on the TV. The power button won't even switch the thing off! Unplugged everything and switched power back on at the socket. Clicks back on but then straight away I can hear another click and nothing seems to happen, just a black screen. Any ideas? Much appreciated. Tom.