Forgive me if this is a double post my phone is in poor signal area.
I have installed ubuntu CLI on memory card and issued reboot command- I was presented with black screen.
Powering down and removing memory card- I can access as removable drive and also web interface.
Sadly no hdmi and I have tried another monitor.
Unless the cable an experia arc hdmi cable with very little use is faulty ( will try to get one tomorrow)
Any suggestions other than a reinstall or RMA