Sky Q box/Toshiba tv keeps going to black screen.

[LeeLi111]

Did anyone find a solution to this? Our new toshiba fire tv was working fine with sky q, then all of a sudden 2 weeks later when we switch over to sky the tv starts to go dark? When i use the tv independently its absolutly fine and the brightness is normal, the moment i use the sky q remote and hdmi for sky q it starts to darken? No reason as to why this has started to happen