Sorry about late reply.
New Remote turned up, tried settings did everything on the page to control the TV press OK signal sent for volume, yes works, press ok for info, yes works, your remote now paired to your TV.
Close.
Try adjusting volume whilst watching TV, no joy.
I can't understand it. If it operates on setup why not on normal operation.
I have now tried 3 remotes (2 boxes upgraded to 360). My 2nd TV works fine volume power mute the lot.
I'm even contemplating changing the make of the TV in the settings to see if I can get it work under another brand name.