Main Sky Q box not working after applying power after losing powers from the mains

[JohnWayneismydad]

Hi,

After reapplying the power to my Sky Q main box after losing power at the mains, I'm no longer getting a picture.

When power is first applied we get the "Please wait, Sky will ready shortly message", but after powering it up from standby we get a blank screen.

Any help would be much appreciated.

Cheers.