Hi,
no more electricity, no more system.
With current design this is "almost" impossible.
Smoke can be much worse:
See
Dubai flight 6
PF had no chances even to change comm to other ATC. The "element" suddenly inserted in the loop had no vision ahead. We may say: smoke from a cargo fire "broke the loop".
You need fresh air to be able to see ahead. This can be done with a
hood.
PS
The same (similar) effect that could explain AF447 PF actions. No valid and reliable inputs to him? Almost zero confidence in the inputs (them) received? This may explain what we learned so far.