Its works fine with the component input, and the picture and sound do function when I use the DVI input. Its just then that the remote can't change anything, no volume up or down, no menu (obviously on the other input of the TV as there is no menu through DVI) when pointed directly at the unit. I have to turn the DVI source off for it to function properly again then menu and volume resume working again.
I'm still inside my initial trial so I don't know if I should expect a replacement unit.

Thanks