Recently my receiver has not been producing sound from any source. When I turn it on, I can hear "air" from the speakers, then the sound is cut off, and then repeats. This basically means that no matter what source, or connections are used, no sound comes out when watching movies/tv/whatever. The thing is, if I leave a source playing for awhile, like a dvd, it will eventually "click" and sound will start playing, and it will work fine until I shut it off. After I shut it off, it might turn and work fine, or it might give me the problem again. Anybody know what might be causing this, and if I can fix it? Thanks.