I have had significant lip sync problems with Sky HD. I have had 2 replacement boxes after routine Sky advice to reset the audio delay did not work. As the sound lags behind the vision, it is not surprising that this method did not work. I am having a mini battle with Sky who claim it is my TV (Sony Bravia Z5800). This cannot be the case as my lip sync issues occur with this TV and a multi room TV in a different room. Furthermore, I have no issues with Freesat TV or bluRay. Customer services at Sky don't deliver on any promises to do with escalating the problem and the advice I receive is inconsistent. I now want cancel Sky because watching movies is not a pleasure because of the lip sync issues. I and am now having a disagreement with Sky about my right to cancel.
I would appreciate any advice. I would urge people to complain if they feel it is a Sky issue.