Good afternoon I can hear noise from tv however screen black a friend told me to check all connecti

[Dragonfly1]

Good afternoon 

I can hear tv however screen black a friend told me to check all con ectio s and try another hdmi wire which I have done still not working think the sky q box faulty 

[Chodley]

You don't have an external amp or soundbar?

[Mark39]

Have you tried restarting your Sky box by switching off at the plug for a minute?