Thanks for the feedback, bodosom!
I'm not sure what you mean by the "latest code". Are you referring to the last firmware update for the 70 or the latest BK Suite software? I believe I have the latest fw but I'll double check. That said, I wouldn't know what to look for as far as the HDMI info is concerned.
I have to say that I'm getting the feeling that it's the B&K that's the problem. I'll try a reset and if that's unsuccessful then I'll be contacting George.