In the context of her searching for a solution herself, rather than coming after having had several service calls etc,  I think just plain old ‘it’s time to find a solution’, as the whole passage sounds to me as if she is giving herself a call to action, rather than further procrastination or exercises in futility. 

(You could go further into free translation and say ‘it’s time to get on and fix it’ - not at all direct translation, but more colloquial English, in some parts anyway).

That is the subjective aspect of translation. There is not a single right answer and even the best and most experienced translators regularly disagree ! 

PS I think either of the ones you suggested is fine - it depends on what you feel best fits what you hear and understand.

And if you want to sound theatrical, you'd say "It is time, a solution be found!", which would flaunt your command of the English subjunctive -- a rare and dying species.