It seems portable hdmi to vga adapters which work fine with atv2 and atv3 don't draw enough power from the hdmi port on the atv4 to work properly. My solution is to use a much older powered hdmi to vga converter instead. This works fine with the atv4. But I think it is rather odd that I have to revert to older technology in order to get hdmi to vga to work with the atv4. Hopefully newer portable adapters will be made soon to work with the atv4. I much prefer portable ones to powered ones.