Q: Why did my hdmi lightning cable stop working?

Was able to watch on the tv screen using mirroring with my new ipad and apples hdmi lightning cable.

Suddenly today no mirroring occurs. The screen goes blank, then "no signal".

When i try with my husbands ipad mini, no problem, his still works, so its not the cable...

I do not want to stand in line for an hour and then have some 'genius' reset my ipad and tell me to go home and try again.

Any ideas?