not switching them off isn't the norm
At the time, I didn't know that it wasn't the norm.
what else did you do that wasn't the norm
No idea.
List all the things that were the norm.
As Dg says, you can't know that the pump hasn't failed can you?
Well, if the caption comes on when sat in the hover and then goes off when flying away, it's pretty obvious that it's not a failure. If it doesn't go off, then...