I had another lead (don't know what speed). Tried that and it seems to be a lot better.All I can tell you is it's shorter than the one I had in it. It's close enough that I don't want to change any settings, just in case. Thanks for the link and tip.Could be the lead,try a high speed HDMI lead.There is some info here
https://forum.kodi.tv/showthread.php?tid=327901
From home screen> settings >Display & Sound >Advanced settings >Audio video syncI have got a shield but I can't find the setting you refer to, if you can point me in the right direction I can check for you.
Mostly sorted....Fox News and CNN both completely out of sync. But all the rest seem to be OK so probably providers problem.Sounds like you have sorted it, but mine is set to 50 if it helps.