[DaveWM]

very odd, the pic is still too high on the screen, I tried reversing the vert yoke leads, again too high on the screen (had to go the the other extreme end of the vert cent to try and center the upside down pic, I am not 100% sure I got that right it got a bit confusing, next time I will just center the pot and see what happens).

I am going to try just unplugging the vert yoke and see where the center line falls (yes brightness will be turned down).

I don't recall if this is normal but in the service setup mode the cent line can be moved by the vert cent pot. At the extreme end its nearly centered but not quite.