5.1 Home theater

My audio and video are out of sync using a Philips Home Theater connected to a television, how do I fix this?

When I press the SURROUND button on my Philips HTS remote while playing movies, why do I only get “Off” and “2.1 ch Stereo” as available surround modes?

Why do I get sound only from my TV speakers when I connect my Philips Home Theater System to my HDTV using HDMI? How do I get sound from my Home Theater speakers?

How do I update my Philips TV, Home Audio or Home Video device?

How can I watch 3D movies?