Yep! What good are these glass panels when the lights go out. Whoever would design and certify an aircraft with only a glass panel and no backup instruments of any kind is beyond me. (Not Cessna obviously - as in, they have done it probably against better judgement, in order to reduce weight)
Duel AHARS will fix the problem of blank screens. ( duel avionics bus as well, ofcourse). That's how I have done it on the 7.