Sky Q box hard disk issue

[Mark140861]

Last night we had a power surge and lost power for about 40 minutes. 
Although the Sky Q box came on and we were able to watch TV; we cannot access our recordings or pause, or wind back live TV. 
I have turned it off and back on again after 10 minutes but it still doesn't work properly. 

[PandJ2020]

If it's a hard disk issue then it's likely to be fatal: https://www.sky.com/help/articles/sky-q-hard-disk-error-messages