Would appreciate some feedback from other victims
DonGould: Thanks Gary, that's interesting stuff to know as I have one of these TVs as well. I had noticed it doing some odd things and now I see why.You're welcome Don. As it happens, I have one too and thanks to the techs who looked into this I've learnt something too and will be tweaking the settings.
kiwimordor: Thanks for all the great tips guys. Appreciated.
However, the problem only occurs when connected to T-Box (HDMI) - not any other HDMI device, nor on HD freeview.
If, as suggested the TV is autodimming due to back light levels and darkness, then I would have thought that this would also be evident in other sources of signal (ie all devices / inputs)
Am I missing something?