Originally Posted by Barry Broskowitz:
That problem of lights going out when hitting the smoke on button has been a bug in the system for years in my opinion
To the best of my knowledge, that is not a DCS bug. Issues like that are most often associated with engines with MUX boards that were wired incorrectly during production.
Unfortunately one of the engines has a upgrade kit... no MUX board but.. some do and they're the one that most frequently do it. Yes 4.1 as well, hmmm time for a change perhaps?