Sky Q box is not responding to remote and no sound

[PhoenixBun]

My sky Q box takes a considerable amount of time to respond to the remote, so changed batteries. 

It didn't change anything. 

Not only that, as of this morning, there's also no sound. 

I tried the tv by itself and a dvd, which are both fine, so it's not my fairly new tv which is less than 6 months old. 

I've done a reset.

Unplugged everything from mains x 2.

Tried other suggestions I found here on another thread. 

I'm out of options ! 

[PhoenixBun]

Actually now, after the last unplug, there's no picture either, just a black screen. Brilliant.