Can you help with what is probably a simple question. We recently bought a LG home cinema system and connected it all up successfully with a sky box feeding through it into the TV. However, on lots of programmes the sound coming from the speakers seems unsynched with the picture on the screen....only just but enough to be annoying. Is this normal with home cinema....the instruction manual doesn't mention it. Is there a setting or a something I should be changing? Hope you can help or point me to a website which can.