I got a new Philips DTV reciever and its doing something odd. Every few min it will have a faint white line go all the way across the top of the scrren and then the picture go's out all together for about 8-12 sec. Any thoughts? I have it hooked up to a HDTV monitor via Componet outputs using Rhino cables. I checked the cables to make sure none were loose. Everything seemed fine.