Whilst watching live TV, my Humax screen went black and TV displayed no input. The STB display still showed it as being on BBC One. I pressed channel up and the display showed it change to BBC Two. I pressed standby, turned back on and still a black screen. I turned off again but waited 20 odd seconds until I hear the click that means it's properly powered down.
Turned on and I have a display. Booted up and after about 10 seconds lost display again. This time I put into standby and unplugged the box. Left for a minute, powered on and I had about 5 minutes of live TV before no display again. Just rebooted and changed display output from 1080p to 1080i and will see what happens.
I haven't checked scart output as I don't have a cable to hand.
Thanks