Okay I may know the answer.
I've now tried all suggestions by everybody who has posted plus lots in other forums.
I've just gone down to basics with one motorised cable into Tuner A and I can move the dish etc with Positioner Setup.
I then put the motorised cable into Tuner B (set to USALS/Advanced etc) and nothing happens, I can't even get a picture.
At this point I've now concluded that Tuner B is buggered.
So can other Duo2 owners use just Tuner B with the second cable removed?
I can do it with my Solo2.
I've now tried all suggestions by everybody who has posted plus lots in other forums.
I've just gone down to basics with one motorised cable into Tuner A and I can move the dish etc with Positioner Setup.
I then put the motorised cable into Tuner B (set to USALS/Advanced etc) and nothing happens, I can't even get a picture.
At this point I've now concluded that Tuner B is buggered.
So can other Duo2 owners use just Tuner B with the second cable removed?
I can do it with my Solo2.