Can anyone help me? I just got my Marantz SR5200 from accessories for less and it isn't working. I plugged it in, and let it warm up for about 15 minutes. I then started hooking up RCAs and S-video cables and what not. The standby light comes on when I push the power button. If I push it again it goes out. If I push one of the input buttons the light goes out and there is no sound.