After successfully booting ubuntu Cli and installing packages to sd card.
I decided to reboot and the result is no hdmi output on any screen using an experia arc hdmi cable.
I can access the device as a removable hard drive or read documentation via ip address so it is up and running.
I just have no hdmi on default os or sd card image.
Any ideas other than trying another cable? And then an RMA if it doesn't spring into life.