Usually an indication your hard drive is failing.
https://www.sky.com/help/articles/sky-q-hard-disk-error-messages
Alternatively, it could be your satellite signal:
https://www.sky.com/help/articles/sky-tv-no-satellite-signal
Any other messages?
If you have to replace your box, remember to remove your viewing card.
I am just another Sky customer and my views are my own even if you don't like the answers
