Mr

[Colin165]

There's something wrong with my sky box it's not coming on 

your since Colin 

[Chodley]

What happens if you power it off at the wall and back on?

[lettice]

Firstly, try a restart of your Sky Q box;

1. Press standby on your Sky Q remote, then switch off or unplug your box at the mains.
2. Check there are no lights on the front panel of your Sky Q box and all cables are securely connected.
3. Plug in and switch your Sky Q box back on at the mains.
4. Wait for the on-screen instructions to disappear then press Home on your Sky Q remote. Some features may take up to 5 minutes to return.

If that does not help, try the recovery procedure as detailed in this Sky help article;

https://www.sky.com/help/home/sky-tv/sky-tv-q/fixing-sky-q/fixing-q-equipment/sky-q-box-wont-turn-on...