Television and Home Theater

When first switched on,everything is normal but after a few seconds the picture goes off as if the horizontal section shuts off and sound remains.

Sam ehting happens when I switch off and swithch on again.Piture remains

for a few seconds and then goes off.

My RCA hdtv model d40w20 has been shutting off by itself-and i don't have the sleep timer on nor parental control on.  It's been doing it quite frequently and i don't know what to do. Sometimes it come back on by itself and other times it won't at all. what does any one suggest?

Does anyone know of a way to stream netflix new watchnow feature from my pc to television. Love the new feature just dont want to watch movies on my 17inch pc monitor when I have a new 50 television in my living room. The watch now feature works with windows media player and works great you can stream movies from there website instantly instead of waiting for them in the mail. Any ideas other then running video wires from my pc to my tv would be great. I hear of a new sling media box called a sling catcher that would do this but no known release date .