I've got a HTS with a Yamaha RXV-1400 and a Screenplay 7200. I've had the system going for a few months now. In the last few weeks, we've noticed that the sound is lagging about a second behind the picture--which is REALLY annoying during dialogue. It's occurring on both Directv and DVD. Has anyone encountered this situation? I cannot find anything in the technical manuals. I do have a three-year-old boy with a love for gadgets. In the past, he has created problems by playing with bright shiny objects. I'm wondering if he did that here. Thanks.